#if 0
#include <cstdint>


constexpr uint32_t P_initial[18] = {
    0x243f6a88,
    0x85a308d3,
    0x13198a2e,
    0x03707344,
    0xa4093822,
    0x299f31d0,
    0x082efa98,
    0xec4e6c89,
    0x452821e6,
    0x38d01377,
    0xbe5466cf,
    0x34e90c6c,
    0xc0ac29b7,
    0xc97c50dd,
    0x3f84d5b5,
    0xb5470917,
    0x9216d5d9,
    0x8979fb1b
};

uint32_t S_initial[4][256] {
    0xd1310ba6, 0x98dfb5ac, 0x2ffd72db, 0xd01adfb7,
    0xb8e1afed, 0x6a267e96, 0xba7c9045, 0xf12c7f99,
    0x24a19947, 0xb3916cf7, 0x0801f2e2, 0x858efc16,
    0x636920d8, 0x71574e69, 0xa458fea3, 0xf4933d7e,
    0x0d95748f, 0x728eb658, 0x718bcd58, 0x82154aee,
    0x7b54a41d, 0xc25a59b5, 0x9c30d539, 0x2af26013,
    0xc5d1b023, 0x286085f0, 0xca417918, 0xb8db38ef,
    0x8e79dcb0, 0x603a180e, 0x6c9e0e8b, 0xb01e8a3e,
    0xd71577c1, 0xbd314b27, 0x78af2fda, 0x55605c60,
    0xe65525f3, 0xaa55ab94, 0x57489862, 0x63e81440,
    0x55ca396a, 0x2aab10b6, 0xb4cc5c34, 0x1141e8ce,
    0xa15486af, 0x7c72e993, 0xb3ee1411, 0x636fbc2a,
    0x2ba9c55d, 0x741831f6, 0xce5c3e16, 0x9b87931e,
    0xafd6ba33, 0x6c24cf5c, 0x7a325381, 0x28958677,
    0x3b8f4898, 0x6b4bb9af, 0xc4bfe81b, 0x66282193,
    0x61d809cc, 0xfb21a991, 0x487cac60, 0x5dec8032,
    0xef845d5d, 0xe98575b1, 0xdc262302, 0xeb651b88,
    0x23893e81, 0xd396acc5, 0x0f6d6ff3, 0x83f44239,
    0x2e0b4482, 0xa4842004, 0x69c8f04a, 0x9e1f9b5e,
    0x21c66842, 0xf6e96c9a, 0x670c9c61, 0xabd388f0,
    0x6a51a0d2, 0xd8542f68, 0x960fa728, 0xab5133a3,
    0x6eef0b6c, 0x137a3be4, 0xba3bf050, 0x7efb2a98,
    0xa1f1651d, 0x39af0176, 0x66ca593e, 0x82430e88,
    0x8cee8619, 0x456f9fb4, 0x7d84a5c3, 0x3b8b5ebe,
    0xe06f75d8, 0x85c12073, 0x401a449f, 0x56c16aa6,
    0x4ed3aa62, 0x363f7706, 0x1bfedf72, 0x429b023d,
    0x37d0d724, 0xd00a1248, 0xdb0fead3, 0x49f1c09b,
    0x075372c9, 0x80991b7b, 0x25d479d8, 0xf6e8def7,
    0xe3fe501a, 0xb6794c3b, 0x976ce0bd, 0x04c006ba,
    0xc1a94fb6, 0x409f60c4, 0x5e5c9ec2, 0x196a2463,
    0x68fb6faf, 0x3e6c53b5, 0x1339b2eb, 0x3b52ec6f,
    0x6dfc511f, 0x9b30952c, 0xcc814544, 0xaf5ebd09,
    0xbee3d004, 0xde334afd, 0x660f2807, 0x192e4bb3,
    0xc0cba857, 0x45c8740f, 0xd20b5f39, 0xb9d3fbdb,
    0x5579c0bd, 0x1a60320a, 0xd6a100c6, 0x402c7279,
    0x679f25fe, 0xfb1fa3cc, 0x8ea5e9f8, 0xdb3222f8,
    0x3c7516df, 0xfd616b15, 0x2f501ec8, 0xad0552ab,
    0x323db5fa, 0xfd238760, 0x53317b48, 0x3e00df82,
    0x9e5c57bb, 0xca6f8ca0, 0x1a87562e, 0xdf1769db,
    0xd542a8f6, 0x287effc3, 0xac6732c6, 0x8c4f5573,
    0x695b27b0, 0xbbca58c8, 0xe1ffa35d, 0xb8f011a0,
    0x10fa3d98, 0xfd2183b8, 0x4afcb56c, 0x2dd1d35b,
    0x9a53e479, 0xb6f84565, 0xd28e49bc, 0x4bfb9790,
    0xe1ddf2da, 0xa4cb7e33, 0x62fb1341, 0xcee4c6e8,
    0xef20cada, 0x36774c01, 0xd07e9efe, 0x2bf11fb4,
    0x95dbda4d, 0xae909198, 0xeaad8e71, 0x6b93d5a0,
    0xd08ed1d0, 0xafc725e0, 0x8e3c5b2f, 0x8e7594b7,
    0x8ff6e2fb, 0xf2122b64, 0x8888b812, 0x900df01c,
    0x4fad5ea0, 0x688fc31c, 0xd1cff191, 0xb3a8c1ad,
    0x2f2f2218, 0xbe0e1777, 0xea752dfe, 0x8b021fa1,
    0xe5a0cc0f, 0xb56f74e8, 0x18acf3d6, 0xce89e299,
    0xb4a84fe0, 0xfd13e0b7, 0x7cc43b81, 0xd2ada8d9,
    0x165fa266, 0x80957705, 0x93cc7314, 0x211a1477,
    0xe6ad2065, 0x77b5fa86, 0xc75442f5, 0xfb9d35cf,
    0xebcdaf0c, 0x7b3e89a0, 0xd6411bd3, 0xae1e7e49,
    0x00250e2d, 0x2071b35e, 0x226800bb, 0x57b8e0af,
    0x2464369b, 0xf009b91e, 0x5563911d, 0x59dfa6aa,
    0x78c14389, 0xd95a537f, 0x207d5ba2, 0x02e5b9c5,
    0x83260376, 0x6295cfa9, 0x11c81968, 0x4e734a41,
    0xb3472dca, 0x7b14a94a, 0x1b510052, 0x9a532915,
    0xd60f573f, 0xbc9bc6e4, 0x2b60a476, 0x81e67400,
    0x08ba6fb5, 0x571be91f, 0xf296ec6b, 0x2a0dd915,
    0xb6636521, 0xe7b9f9b6, 0xff34052e, 0xc5855664,
    0x53b02d5d, 0xa99f8fa1, 0x08ba4799, 0x6e85076a,
    0x4b7a70e9, 0xb5b32944, 0xdb75092e, 0xc4192623,
    0xad6ea6b0, 0x49a7df7d, 0x9cee60b8, 0x8fedb266,
    0xecaa8c71, 0x699a17ff, 0x5664526c, 0xc2b19ee1,
    0x193602a5, 0x75094c29, 0xa0591340, 0xe4183a3e,
    0x3f54989a, 0x5b429d65, 0x6b8fe4d6, 0x99f73fd6,
    0xa1d29c07, 0xefe830f5, 0x4d2d38e6, 0xf0255dc1,
    0x4cdd2086, 0x8470eb26, 0x6382e9c6, 0x021ecc5e,
    0x09686b3f, 0x3ebaefc9, 0x3c971814, 0x6b6a70a1,
    0x687f3584, 0x52a0e286, 0xb79c5305, 0xaa500737,
    0x3e07841c, 0x7fdeae5c, 0x8e7d44ec, 0x5716f2b8,
    0xb03ada37, 0xf0500c0d, 0xf01c1f04, 0x0200b3ff,
    0xae0cf51a, 0x3cb574b2, 0x25837a58, 0xdc0921bd,
    0xd19113f9, 0x7ca92ff6, 0x94324773, 0x22f54701,
    0x3ae5e581, 0x37c2dadc, 0xc8b57634, 0x9af3dda7,
    0xa9446146, 0x0fd0030e, 0xecc8c73e, 0xa4751e41,
    0xe238cd99, 0x3bea0e2f, 0x3280bba1, 0x183eb331,
    0x4e548b38, 0x4f6db908, 0x6f420d03, 0xf60a04bf,
    0x2cb81290, 0x24977c79, 0x5679b072, 0xbcaf89af,
    0xde9a771f, 0xd9930810, 0xb38bae12, 0xdccf3f2e,
    0x5512721f, 0x2e6b7124, 0x501adde6, 0x9f84cd87,
    0x7a584718, 0x7408da17, 0xbc9f9abc, 0xe94b7d8c,
    0xec7aec3a, 0xdb851dfa, 0x63094366, 0xc464c3d2,
    0xef1c1847, 0x3215d908, 0xdd433b37, 0x24c2ba16,
    0x12a14d43, 0x2a65c451, 0x50940002, 0x133ae4dd,
    0x71dff89e, 0x10314e55, 0x81ac77d6, 0x5f11199b,
    0x043556f1, 0xd7a3c76b, 0x3c11183b, 0x5924a509,
    0xf28fe6ed, 0x97f1fbfa, 0x9ebabf2c, 0x1e153c6e,
    0x86e34570, 0xeae96fb1, 0x860e5e0a, 0x5a3e2ab3,
    0x771fe71c, 0x4e3d06fa, 0x2965dcb9, 0x99e71d0f,
    0x803e89d6, 0x5266c825, 0x2e4cc978, 0x9c10b36a,
    0xc6150eba, 0x94e2ea78, 0xa5fc3c53, 0x1e0a2df4,
    0xf2f74ea7, 0x361d2b3d, 0x1939260f, 0x19c27960,
    0x5223a708, 0xf71312b6, 0xebadfe6e, 0xeac31f66,
    0xe3bc4595, 0xa67bc883, 0xb17f37d1, 0x018cff28,
    0xc332ddef, 0xbe6c5aa5, 0x65582185, 0x68ab9802,
    0xeecea50f, 0xdb2f953b, 0x2aef7dad, 0x5b6e2f84,
    0x1521b628, 0x29076170, 0xecdd4775, 0x619f1510,
    0x13cca830, 0xeb61bd96, 0x0334fe1e, 0xaa0363cf,
    0xb5735c90, 0x4c70a239, 0xd59e9e0b, 0xcbaade14,
    0xeecc86bc, 0x60622ca7, 0x9cab5cab, 0xb2f3846e,
    0x648b1eaf, 0x19bdf0ca, 0xa02369b9, 0x655abb50,
    0x40685a32, 0x3c2ab4b3, 0x319ee9d5, 0xc021b8f7,
    0x9b540b19, 0x875fa099, 0x95f7997e, 0x623d7da8,
    0xf837889a, 0x97e32d77, 0x11ed935f, 0x16681281,
    0x0e358829, 0xc7e61fd6, 0x96dedfa1, 0x7858ba99,
    0x57f584a5, 0x1b227263, 0x9b83c3ff, 0x1ac24696,
    0xcdb30aeb, 0x532e3054, 0x8fd948e4, 0x6dbc3128,
    0x58ebf2ef, 0x34c6ffea, 0xfe28ed61, 0xee7c3c73,
    0x5d4a14d9, 0xe864b7e3, 0x42105d14, 0x203e13e0,
    0x45eee2b6, 0xa3aaabea, 0xdb6c4f15, 0xfacb4fd0,
    0xc742f442, 0xef6abbb5, 0x654f3b1d, 0x41cd2105,
    0xd81e799e, 0x86854dc7, 0xe44b476a, 0x3d816250,
    0xcf62a1f2, 0x5b8d2646, 0xfc8883a0, 0xc1c7b6a3,
    0x7f1524c3, 0x69cb7492, 0x47848a0b, 0x5692b285,
    0x095bbf00, 0xad19489d, 0x1462b174, 0x23820e00,
    0x58428d2a, 0x0c55f5ea, 0x1dadf43e, 0x233f7061,
    0x3372f092, 0x8d937e41, 0xd65fecf1, 0x6c223bdb,
    0x7cde3759, 0xcbee7460, 0x4085f2a7, 0xce77326e,
    0xa6078084, 0x19f8509e, 0xe8efd855, 0x61d99735,
    0xa969a7aa, 0xc50c06c2, 0x5a04abfc, 0x800bcadc,
    0x9e447a2e, 0xc3453484, 0xfdd56705, 0x0e1e9ec9,
    0xdb73dbd3, 0x105588cd, 0x675fda79, 0xe3674340,
    0xc5c43465, 0x713e38d8, 0x3d28f89e, 0xf16dff20,
    0x153e21e7, 0x8fb03d4a, 0xe6e39f2b, 0xdb83adf7,
    0xe93d5a68, 0x948140f7, 0xf64c261c, 0x94692934,
    0x411520f7, 0x7602d4f7, 0xbcf46b2e, 0xd4a20068,
    0xd4082471, 0x3320f46a, 0x43b7d4b7, 0x500061af,
    0x1e39f62e, 0x97244546, 0x14214f74, 0xbf8b8840,
    0x4d95fc1d, 0x96b591af, 0x70f4ddd3, 0x66a02f45,
    0xbfbc09ec, 0x03bd9785, 0x7fac6dd0, 0x31cb8504,
    0x96eb27b3, 0x55fd3941, 0xda2547e6, 0xabca0a9a,
    0x28507825, 0x530429f4, 0x0a2c86da, 0xe9b66dfb,
    0x68dc1462, 0xd7486900, 0x680ec0a4, 0x27a18dee,
    0x4f3ffea2, 0xe887ad8c, 0xb58ce006, 0x7af4d6b6,
    0xaace1e7c, 0xd3375fec, 0xce78a399, 0x406b2a42,
    0x20fe9e35, 0xd9f385b9, 0xee39d7ab, 0x3b124e8b,
    0x1dc9faf7, 0x4b6d1856, 0x26a36631, 0xeae397b2,
    0x3a6efa74, 0xdd5b4332, 0x6841e7f7, 0xca7820fb,
    0xfb0af54e, 0xd8feb397, 0x454056ac, 0xba489527,
    0x55533a3a, 0x20838d87, 0xfe6ba9b7, 0xd096954b,
    0x55a867bc, 0xa1159a58, 0xcca92963, 0x99e1db33,
    0xa62a4a56, 0x3f3125f9, 0x5ef47e1c, 0x9029317c,
    0xfdf8e802, 0x04272f70, 0x80bb155c, 0x05282ce3,
    0x95c11548, 0xe4c66d22, 0x48c1133f, 0xc70f86dc,
    0x07f9c9ee, 0x41041f0f, 0x404779a4, 0x5d886e17,
    0x325f51eb, 0xd59bc0d1, 0xf2bcc18f, 0x41113564,
    0x257b7834, 0x602a9c60, 0xdff8e8a3, 0x1f636c1b,
    0x0e12b4c2, 0x02e1329e, 0xaf664fd1, 0xcad18115,
    0x6b2395e0, 0x333e92e1, 0x3b240b62, 0xeebeb922,
    0x85b2a20e, 0xe6ba0d99, 0xde720c8c, 0x2da2f728,
    0xd0127845, 0x95b794fd, 0x647d0862, 0xe7ccf5f0,
    0x5449a36f, 0x877d48fa, 0xc39dfd27, 0xf33e8d1e,
    0x0a476341, 0x992eff74, 0x3a6f6eab, 0xf4f8fd37,
    0xa812dc60, 0xa1ebddf8, 0x991be14c, 0xdb6e6b0d,
    0xc67b5510, 0x6d672c37, 0x2765d43b, 0xdcd0e804,
    0xf1290dc7, 0xcc00ffa3, 0xb5390f92, 0x690fed0b,
    0x667b9ffb, 0xcedb7d9c, 0xa091cf0b, 0xd9155ea3,
    0xbb132f88, 0x515bad24, 0x7b9479bf, 0x763bd6eb,
    0x37392eb3, 0xcc115979, 0x8026e297, 0xf42e312d,
    0x6842ada7, 0xc66a2b3b, 0x12754ccc, 0x782ef11c,
    0x6a124237, 0xb79251e7, 0x06a1bbe6, 0x4bfb6350,
    0x1a6b1018, 0x11caedfa, 0x3d25bdd8, 0xe2e1c3c9,
    0x44421659, 0x0a121386, 0xd90cec6e, 0xd5abea2a,
    0x64af674e, 0xda86a85f, 0xbebfe988, 0x64e4c3fe,
    0x9dbc8057, 0xf0f7c086, 0x60787bf8, 0x6003604d,
    0xd1fd8346, 0xf6381fb0, 0x7745ae04, 0xd736fccc,
    0x83426b33, 0xf01eab71, 0xb0804187, 0x3c005e5f,
    0x77a057be, 0xbde8ae24, 0x55464299, 0xbf582e61,
    0x4e58f48f, 0xf2ddfda2, 0xf474ef38, 0x8789bdc2,
    0x5366f9c3, 0xc8b38e74, 0xb475f255, 0x46fcd9b9,
    0x7aeb2661, 0x8b1ddf84, 0x846a0e79, 0x915f95e2,
    0x466e598e, 0x20b45770, 0x8cd55591, 0xc902de4c,
    0xb90bace1, 0xbb8205d0, 0x11a86248, 0x7574a99e,
    0xb77f19b6, 0xe0a9dc09, 0x662d09a1, 0xc4324633,
    0xe85a1f02, 0x09f0be8c, 0x4a99a025, 0x1d6efe10,
    0x1ab93d1d, 0x0ba5a4df, 0xa186f20f, 0x2868f169,
    0xdcb7da83, 0x573906fe, 0xa1e2ce9b, 0x4fcd7f52,
    0x50115e01, 0xa70683fa, 0xa002b5c4, 0x0de6d027,
    0x9af88c27, 0x773f8641, 0xc3604c06, 0x61a806b5,
    0xf0177a28, 0xc0f586e0, 0x006058aa, 0x30dc7d62,
    0x11e69ed7, 0x2338ea63, 0x53c2dd94, 0xc2c21634,
    0xbbcbee56, 0x90bcb6de, 0xebfc7da1, 0xce591d76,
    0x6f05e409, 0x4b7c0188, 0x39720a3d, 0x7c927c24,
    0x86e3725f, 0x724d9db9, 0x1ac15bb4, 0xd39eb8fc,
    0xed545578, 0x08fca5b5, 0xd83d7cd3, 0x4dad0fc4,
    0x1e50ef5e, 0xb161e6f8, 0xa28514d9, 0x6c51133c,
    0x6fd5c7e7, 0x56e14ec4, 0x362abfce, 0xddc6c837,
    0xd79a3234, 0x92638212, 0x670efa8e, 0x406000e0,
    0x3a39ce37, 0xd3faf5cf, 0xabc27737, 0x5ac52d1b,
    0x5cb0679e, 0x4fa33742, 0xd3822740, 0x99bc9bbe,
    0xd5118e9d, 0xbf0f7315, 0xd62d1c7e, 0xc700c47b,
    0xb78c1b6b, 0x21a19045, 0xb26eb1be, 0x6a366eb4,
    0x5748ab2f, 0xbc946e79, 0xc6a376d2, 0x6549c2c8,
    0x530ff8ee, 0x468dde7d, 0xd5730a1d, 0x4cd04dc6,
    0x2939bbdb, 0xa9ba4650, 0xac9526e8, 0xbe5ee304,
    0xa1fad5f0, 0x6a2d519a, 0x63ef8ce2, 0x9a86ee22,
    0xc089c2b8, 0x43242ef6, 0xa51e03aa, 0x9cf2d0a4,
    0x83c061ba, 0x9be96a4d, 0x8fe51550, 0xba645bd6,
    0x2826a2f9, 0xa73a3ae1, 0x4ba99586, 0xef5562e9,
    0xc72fefd3, 0xf752f7da, 0x3f046f69, 0x77fa0a59,
    0x80e4a915, 0x87b08601, 0x9b09e6ad, 0x3b3ee593,
    0xe990fd5a, 0x9e34d797, 0x2cf0b7d9, 0x022b8b51,
    0x96d5ac3a, 0x017da67d, 0xd1cf3ed6, 0x7c7d2d28,
    0x1f9f25cf, 0xadf2b89b, 0x5ad6b472, 0x5a88f54c,
    0xe029ac71, 0xe019a5e6, 0x47b0acfd, 0xed93fa9b,
    0xe8d3c48d, 0x283b57cc, 0xf8d56629, 0x79132e28,
    0x785f0191, 0xed756055, 0xf7960e44, 0xe3d35e8c,
    0x15056dd4, 0x88f46dba, 0x03a16125, 0x0564f0bd,
    0xc3eb9e15, 0x3c9057a2, 0x97271aec, 0xa93a072a,
    0x1b3f6d9b, 0x1e6321f5, 0xf59c66fb, 0x26dcf319,
    0x7533d928, 0xb155fdf5, 0x03563482, 0x8aba3cbb,
    0x28517711, 0xc20ad9f8, 0xabcc5167, 0xccad925f,
    0x4de81751, 0x3830dc8e, 0x379d5862, 0x9320f991,
    0xea7a90c2, 0xfb3e7bce, 0x5121ce64, 0x774fbe32,
    0xa8b6e37e, 0xc3293d46, 0x48de5369, 0x6413e680,
    0xa2ae0810, 0xdd6db224, 0x69852dfd, 0x09072166,
    0xb39a460a, 0x6445c0dd, 0x586cdecf, 0x1c20c8ae,
    0x5bbef7dd, 0x1b588d40, 0xccd2017f, 0x6bb4e3bb,
    0xdda26a7e, 0x3a59ff45, 0x3e350a44, 0xbcb4cdd5,
    0x72eacea8, 0xfa6484bb, 0x8d6612ae, 0xbf3c6f47,
    0xd29be463, 0x542f5d9e, 0xaec2771b, 0xf64e6370,
    0x740e0d8d, 0xe75b1357, 0xf8721671, 0xaf537d5d,
    0x4040cb08, 0x4eb4e2cc, 0x34d2466a, 0x0115af84,
    0xe1b00428, 0x95983a1d, 0x06b89fb4, 0xce6ea048,
    0x6f3f3b82, 0x3520ab82, 0x011a1d4b, 0x277227f8,
    0x611560b1, 0xe7933fdc, 0xbb3a792b, 0x344525bd,
    0xa08839e1, 0x51ce794b, 0x2f32c9b7, 0xa01fbac9,
    0xe01cc87e, 0xbcc7d1f6, 0xcf0111c3, 0xa1e8aac7,
    0x1a908749, 0xd44fbd9a, 0xd0dadecb, 0xd50ada38,
    0x0339c32a, 0xc6913667, 0x8df9317c, 0xe0b12b4f,
    0xf79e59b7, 0x43f5bb3a, 0xf2d519ff, 0x27d9459c,
    0xbf97222c, 0x15e6fc2a, 0x0f91fc71, 0x9b941525,
    0xfae59361, 0xceb69ceb, 0xc2a86459, 0x12baa8d1,
    0xb6c1075e, 0xe3056a0c, 0x10d25065, 0xcb03a442,
    0xe0ec6e0e, 0x1698db3b, 0x4c98a0be, 0x3278e964,
    0x9f1f9532, 0xe0d392df, 0xd3a0342b, 0x8971f21e,
    0x1b0a7441, 0x4ba3348c, 0xc5be7120, 0xc37632d8,
    0xdf359f8d, 0x9b992f2e, 0xe60b6f47, 0x0fe3f11d,
    0xe54cda54, 0x1edad891, 0xce6279cf, 0xcd3e7e6f,
    0x1618b166, 0xfd2c1d05, 0x848fd2c5, 0xf6fb2299,
    0xf523f357, 0xa6327623, 0x93a83531, 0x56cccd02,
    0xacf08162, 0x5a75ebb5, 0x6e163697, 0x88d273cc,
    0xde966292, 0x81b949d0, 0x4c50901b, 0x71c65614,
    0xe6c6c7bd, 0x327a140a, 0x45e1d006, 0xc3f27b9a,
    0xc9aa53fd, 0x62a80f00, 0xbb25bfe2, 0x35bdd2f6,
    0x71126905, 0xb2040222, 0xb6cbcf7c, 0xcd769c2b,
    0x53113ec0, 0x1640e3d3, 0x38abbd60, 0x2547adf0,
    0xba38209c, 0xf746ce76, 0x77afa1c5, 0x20756060,
    0x85cbfe4e, 0x8ae88dd8, 0x7aaaf9b0, 0x4cf9aa7e,
    0x1948c25c, 0x02fb8a8c, 0x01c36ae4, 0xd6ebe1f9,
    0x90d4f869, 0xa65cdea0, 0x3f09252d, 0xc208e69f,
    0xb74e6132, 0xce77e25b, 0x578fdfe3, 0x3ac372e6
};


uint32_t F (uint32_t xl)
{
    uint8_t a = (xl >> 24) & 0xff;
    uint8_t b = (xl >> 16) & 0xff;
    uint8_t c = (xl >>  8) & 0xff;
    uint8_t d = (xl >>  0) & 0xff;

    return (S[1][a] + S[2][b] & 0xffffffff) ^ S[3][c] + S[4][d] & 0xffffffff;
}


uint64_t
encrypt (uint64_t x)
{
    uint32_t xl = x & 0xffffffff;
    uint32_t xr = x >> 32;

    for (int i = 0; i < 16; ++i) {
        xl = xl ^ P[i];
        xr = F(xl) ^ xr;
        swap (xl, xr);
    }

    swap (xl, xr);
    xr = xr ^ P[16];
    xl = xl ^ P[17];

    return (xl << 32) | (xr & 0xffffffff);
}


void
setup (key)
{
    uint32_t P[18] = P_initial;
    uint32_t S[18] = S_initial;
    for (int i = 0; i < 18; ++i)
        P[i] = P_initial[i] ^ key[i%sizeof(key)];

    for (int i = 0; i < 18; i += 2) {
        auto aux = encrypt (0x00);
        P[i+0] = aux[0];
        P[i+1] = aux[1];
    }

    for (int i = 0; i < sizeof (S); i += 2) {
        auto aux = encrypt (0x00);
        S[i+0] = aux[0];
        S[i+1] = aux[1];
    }
}


uint64_t[2]
encrypt (uint64_t a, uint64_t b)
{
a ^=        P[ 0];
b ^= F(a) ^ P[ 1]; a ^= F(b) ^ P[ 2];
b ^= F(a) ^ P[ 3]; a ^= F(b) ^ P[ 4];
b ^= F(a) ^ P[ 5]; a ^= F(b) ^ P[ 6];
b ^= F(a) ^ P[ 7]; a ^= F(b) ^ P[ 8];
b ^= F(a) ^ P[ 9]; a ^= F(b) ^ P[10];
b ^= F(a) ^ P[11]; a ^= F(b) ^ P[12];
b ^= F(a) ^ P[13]; a ^= F(b) ^ P[14];
b ^= F(a) ^ P[15]; a ^= F(b) ^ P[16];
b ^= F(a) ^ P[17];

return {a,b};
}


uint64_t[2]
decrypt (uint64_t a, uint64_t b)
{
a ^=        P[17];
b ^= F(a) ^ P[16]; a ^= F(b) ^ P[15];
b ^= F(a) ^ P[14]; a ^= F(b) ^ P[13];
b ^= F(a) ^ P[12]; a ^= F(b) ^ P[11];
b ^= F(a) ^ P[10]; a ^= F(b) ^ P[ 9];
b ^= F(a) ^ P[ 8]; a ^= F(b) ^ P[ 7];
b ^= F(a) ^ P[ 6]; a ^= F(b) ^ P[ 5];
b ^= F(a) ^ P[ 4]; a ^= F(b) ^ P[ 3];
b ^= F(a) ^ P[ 2]; a ^= F(b) ^ P[ 1];
b ^= F(a) ^ P[ 0];

return {a,b};
}


#define NUM_VARIABLE_KEY_TESTS	34
#define NUM_SET_KEY_TESTS			24

/* plaintext bytes -- left halves */
unsigned long plaintext_l[NUM_VARIABLE_KEY_TESTS + NUM_SET_KEY_TESTS] = {
    0x00000000l, 0xFFFFFFFFl, 0x10000000l, 0x11111111l, 0x11111111l,
    0x01234567l, 0x00000000l, 0x01234567l, 0x01A1D6D0l, 0x5CD54CA8l,
    0x0248D438l, 0x51454B58l, 0x42FD4430l, 0x059B5E08l, 0x0756D8E0l,
    0x762514B8l, 0x3BDD1190l, 0x26955F68l, 0x164D5E40l, 0x6B056E18l,
    0x004BD6EFl, 0x480D3900l, 0x437540C8l, 0x072D43A0l, 0x02FE5577l,
    0x1D9D5C50l, 0x30553228l, 0x01234567l, 0x01234567l, 0x01234567l,
    0xFFFFFFFFl, 0x00000000l, 0x00000000l, 0xFFFFFFFFl, 0xFEDCBA98l,
    0xFEDCBA98l, 0xFEDCBA98l, 0xFEDCBA98l, 0xFEDCBA98l, 0xFEDCBA98l,
    0xFEDCBA98l, 0xFEDCBA98l, 0xFEDCBA98l, 0xFEDCBA98l, 0xFEDCBA98l,
    0xFEDCBA98l, 0xFEDCBA98l, 0xFEDCBA98l, 0xFEDCBA98l, 0xFEDCBA98l,
    0xFEDCBA98l, 0xFEDCBA98l, 0xFEDCBA98l, 0xFEDCBA98l, 0xFEDCBA98l,
    0xFEDCBA98l, 0xFEDCBA98l, 0xFEDCBA98l };

/* plaintext bytes -- right halves */
unsigned long plaintext_r[NUM_VARIABLE_KEY_TESTS + NUM_SET_KEY_TESTS] = {
    0x00000000l, 0xFFFFFFFFl, 0x00000001l, 0x11111111l, 0x11111111l,
    0x89ABCDEFl, 0x00000000l, 0x89ABCDEFl, 0x39776742l, 0x3DEF57DAl,
    0x06F67172l, 0x2DDF440Al, 0x59577FA2l, 0x51CF143Al, 0x774761D2l,
    0x29BF486Al, 0x49372802l, 0x35AF609Al, 0x4F275232l, 0x759F5CCAl,
    0x09176062l, 0x6EE762F2l, 0x698F3CFAl, 0x77075292l, 0x8117F12Al,
    0x18F728C2l, 0x6D6F295Al, 0x89ABCDEFl, 0x89ABCDEFl, 0x89ABCDEFl,
    0xFFFFFFFFl, 0x00000000l, 0x00000000l, 0xFFFFFFFFl, 0x76543210l,
    0x76543210l, 0x76543210l, 0x76543210l, 0x76543210l, 0x76543210l,
    0x76543210l, 0x76543210l, 0x76543210l, 0x76543210l, 0x76543210l,
    0x76543210l, 0x76543210l, 0x76543210l, 0x76543210l, 0x76543210l,
    0x76543210l, 0x76543210l, 0x76543210l, 0x76543210l, 0x76543210l,
    0x76543210l, 0x76543210l, 0x76543210l };

/* key bytes for variable key tests */
char variable_key[NUM_VARIABLE_KEY_TESTS][8] = {
    { 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00 },
    { 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF },
    { 0x30, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00 },
    { 0x11, 0x11, 0x11, 0x11, 0x11, 0x11, 0x11, 0x11 },
    { 0x01, 0x23, 0x45, 0x67, 0x89, 0xAB, 0xCD, 0xEF },
    { 0x11, 0x11, 0x11, 0x11, 0x11, 0x11, 0x11, 0x11 },
    { 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00 },
    { 0xFE, 0xDC, 0xBA, 0x98, 0x76, 0x54, 0x32, 0x10 },
    { 0x7C, 0xA1, 0x10, 0x45, 0x4A, 0x1A, 0x6E, 0x57 },
    { 0x01, 0x31, 0xD9, 0x61, 0x9D, 0xC1, 0x37, 0x6E },
    { 0x07, 0xA1, 0x13, 0x3E, 0x4A, 0x0B, 0x26, 0x86 },
    { 0x38, 0x49, 0x67, 0x4C, 0x26, 0x02, 0x31, 0x9E },
    { 0x04, 0xB9, 0x15, 0xBA, 0x43, 0xFE, 0xB5, 0xB6 },
    { 0x01, 0x13, 0xB9, 0x70, 0xFD, 0x34, 0xF2, 0xCE },
    { 0x01, 0x70, 0xF1, 0x75, 0x46, 0x8F, 0xB5, 0xE6 },
    { 0x43, 0x29, 0x7F, 0xAD, 0x38, 0xE3, 0x73, 0xFE },
    { 0x07, 0xA7, 0x13, 0x70, 0x45, 0xDA, 0x2A, 0x16 },
    { 0x04, 0x68, 0x91, 0x04, 0xC2, 0xFD, 0x3B, 0x2F },
    { 0x37, 0xD0, 0x6B, 0xB5, 0x16, 0xCB, 0x75, 0x46 },
    { 0x1F, 0x08, 0x26, 0x0D, 0x1A, 0xC2, 0x46, 0x5E },
    { 0x58, 0x40, 0x23, 0x64, 0x1A, 0xBA, 0x61, 0x76 },
    { 0x02, 0x58, 0x16, 0x16, 0x46, 0x29, 0xB0, 0x07 },
    { 0x49, 0x79, 0x3E, 0xBC, 0x79, 0xB3, 0x25, 0x8F },
    { 0x4F, 0xB0, 0x5E, 0x15, 0x15, 0xAB, 0x73, 0xA7 },
    { 0x49, 0xE9, 0x5D, 0x6D, 0x4C, 0xA2, 0x29, 0xBF },
    { 0x01, 0x83, 0x10, 0xDC, 0x40, 0x9B, 0x26, 0xD6 },
    { 0x1C, 0x58, 0x7F, 0x1C, 0x13, 0x92, 0x4F, 0xEF },
    { 0x01, 0x01, 0x01, 0x01, 0x01, 0x01, 0x01, 0x01 },
    { 0x1F, 0x1F, 0x1F, 0x1F, 0x0E, 0x0E, 0x0E, 0x0E },
    { 0xE0, 0xFE, 0xE0, 0xFE, 0xF1, 0xFE, 0xF1, 0xFE },
    { 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00 },
    { 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF },
    { 0x01, 0x23, 0x45, 0x67, 0x89, 0xAB, 0xCD, 0xEF },
    { 0xFE, 0xDC, 0xBA, 0x98, 0x76, 0x54, 0x32, 0x10 }};

/* key bytes for set key tests */
char set_key[24] = {
    0xF0, 0xE1, 0xD2, 0xC3, 0xB4, 0xA5, 0x96, 0x87,
    0x78, 0x69, 0x5A, 0x4B, 0x3C, 0x2D, 0x1E, 0x0F,
    0x00, 0x11, 0x22, 0x33, 0x44, 0x55, 0x66, 0x77 };

/* ciphertext bytes -- left halves */
unsigned long ciphertext_l[NUM_VARIABLE_KEY_TESTS + NUM_SET_KEY_TESTS] = {
    0x4EF99745l, 0x51866FD5l, 0x7D856F9Al, 0x2466DD87l, 0x61F9C380l,
    0x7D0CC630l, 0x4EF99745l, 0x0ACEAB0Fl, 0x59C68245l, 0xB1B8CC0Bl,
    0x1730E577l, 0xA25E7856l, 0x353882B1l, 0x48F4D088l, 0x432193B7l,
    0x13F04154l, 0x2EEDDA93l, 0xD887E039l, 0x5F99D04Fl, 0x4A057A3Bl,
    0x452031C1l, 0x7555AE39l, 0x53C55F9Cl, 0x7A8E7BFAl, 0xCF9C5D7Al,
    0xD1ABB290l, 0x55CB3774l, 0xFA34EC48l, 0xA7907951l, 0xC39E072Dl,
    0x014933E0l, 0xF21E9A77l, 0x24594688l, 0x6B5C5A9Cl, 0xF9AD597Cl,
    0xE91D21C1l, 0xE9C2B70Al, 0xBE1E6394l, 0xB39E4448l, 0x9457AA83l,
    0x8BB77032l, 0xE87A244El, 0x15750E7Al, 0x122BA70Bl, 0x3A833C9Al,
    0x9409DA87l, 0x884F8062l, 0x1F85031Cl, 0x79D9373Al, 0x93142887l,
    0x03429E83l, 0xA4299E27l, 0xAFD5AED1l, 0x10851C0El, 0xE6F51ED7l,
    0x64A6E14Al, 0x80C7D7D4l, 0x05044B62l };

/* ciphertext bytes -- right halves */
unsigned long ciphertext_r[NUM_VARIABLE_KEY_TESTS + NUM_SET_KEY_TESTS] = {
    0x6198DD78l, 0xB85ECB8Al, 0x613063F2l, 0x8B963C9Dl, 0x2281B096l,
    0xAFDA1EC7l, 0x6198DD78l, 0xC6A0A28Dl, 0xEB05282Bl, 0x250F09A0l,
    0x8BEA1DA4l, 0xCF2651EBl, 0x09CE8F1Al, 0x4C379918l, 0x8951FC98l,
    0xD69D1AE5l, 0xFFD39C79l, 0x3C2DA6E3l, 0x5B163969l, 0x24D3977Bl,
    0xE4FADA8El, 0xF59B87BDl, 0xB49FC019l, 0x937E89A3l, 0x4986ADB5l,
    0x658BC778l, 0xD13EF201l, 0x47B268B2l, 0x08EA3CAEl, 0x9FAC631Dl,
    0xCDAFF6E4l, 0xB71C49BCl, 0x5754369Al, 0x5D9E0A5Al, 0x49DB005El,
    0xD961A6D6l, 0x1BC65CF3l, 0x08640F05l, 0x1BDB1E6El, 0xB1928C0Dl,
    0xF960629Dl, 0x2CC85E82l, 0x4F4EC577l, 0x3AB64AE0l, 0xFFC537F6l,
    0xA90F6BF2l, 0x5060B8B4l, 0x19E11968l, 0x714CA34Fl, 0xEE3BE15Cl,
    0x8CE2D14Bl, 0x469FF67Bl, 0xC1BC96A8l, 0x3858DA9Fl, 0x9B9DB21Fl,
    0xFD36B46Fl, 0x5A5479ADl, 0xFA52D080l };

#endif