IP := [ 58, 50,42,34,26,18,10,2,   60,52,44,36,28,20,12,4,         62,54,46,38,30,22,14,6,    64,56,48,40,32,24,16,8,     57,49,41,33,25,17,9,1,     59,51,43,35,27,19,11,3,      61,53,45,37,29,21,13,5,     63,55,47,39,31,23,15,7];

IP_INV := [ 40,8,48,16,56,24,64,32,  39,7,47,15,55,23,63,31,  38,6,46,14,54,22,62,30,  37,5,45,13,53,21,61,29,     36,4,44,12,52,20,60,28,  35,3,43,11,51,19,59,27,   34,2,42,10,50,18,58,26,  33,1,41,9,49,17,57,25];

E := [ 32,1,2,3,4,5,    4,5,6,7,8,9,   8,9,10,11,12,13,   12,13,14,15,16,17,   16,17,18,19,20,21,   20,21,22,23,24,25,    24,25,26,27,28,29,   28,29,30,31,32,1];

P := [ 16,7,20,21,   29,12,28,17,   1,15,23,26,   5,18,31,10,   2,8,24,14,   32,27,3,9,   19,13,30,6,    22,11,4,25];

PC1 := [ 57,49,41,33,25,17,9,    1,58,50,42,34,26,18,    10,2,59,51,43,35,27,   19,11,3,60,52,44,36,   63,55,47,39,31,23,15,   7,62,54,46,38,30,22,   14,6,61,53,45,37,29,   21,13,5,28,20,12,4];

PC2 := [ 14,17,11,24,1,5,   3,28,15,6,21,10,   23,19,12,4,26,8,   16,7,27,20,13,2,   41,52,31,37,47,55,   30,40,51,45,33,48,   44,49,39,56,34,53,   46,42,50,36,29,32];

S1 := [  [ 14,4,13,1,   2,15,11,8,   3,10,6,12,    5,9,0,7], [ 0,15,7,4,   14,2,13,1,   10,6,12,11,   9,5,3,8], [ 4,1,14,8,   13,6,2,11,   15,12,9,7,   3,10,5,0], [ 15,12,8,2,   4,9,1,7,   5,11,3,14,   10,0,6,13]];

S2 := [  [ 15,1,8,14,   6,11,3,4,   9,7,2,13,   12,0,5,10], [ 3,13,4,7,   15,2,8,14,    12,0,1,10,   6,9,11,5], [ 0,14,7,11,   10,4,13,1,   5,8,12,6,   9,3,2,15],  [ 13,8,10,1,   3,15,4,2,   11,6,7,12,   0,5,14,9]];

S3 := [  [ 10,0,9,14,   6,3,15,5,   1,13,12,7,   11,4,2,8], [ 13,7,0,9,    3,4,6,10,   2,8,5,14,   12,11,15,1],  [ 13,6,4,9,   8,15,3,0,   11,1,2,12,   5,10,14,7], [ 1,10,13,0,   6,9,8,7,   4,15,14,3,   11,5,2,12]];

S4 := [ [ 7,13,14,3,   0,6,9,10,   1,2,8,5,   11,12,4,15], [  13,8,11,5,   6,15,0,3,   4,7,2,12,   1,10,14,9], [ 10,6,9,0,   12,11,7,13,   15,1,3,14,    5,2,8,4], [ 3,15,0,6,   10,1,13,8,   9,4,5,11,    12,7,2,14]];

S5 := [ [ 2,12,4,1,   7,10,11,6,   8,5,3,15,   13,0,14,9], [ 14,11,2,12,   4,7,13,1,   5,0,15,10,   3,9,8,6], [ 4,2,1,11,   10,13,7,8,   15,9,12,5,    6,3,0,14], [ 11,8,12,7,   1,14,2,13,   6,15,0,9,   10,4,5,3]];

S6 := [ [ 12,1,10,15,   9,2,6,8,   0,13,3,4,   14,7,5,11], [ 10,15,4,2,   7,12,9,5,   6,1,13,14,   0,11,3,8], [ 9,14,15,5,   2,8,12,3,   7,0,4,10,   1,13,11,6], [ 4,3,2,12,   9,5,15,10,   11,14,1,7,   6,0,8,13]];


S7 := [  [ 4,11,2,14,   15,0,8,13,   3,12,9,7,   5,10,6,1], [ 13,0,11,7,   4,9,1,10,   14,3,5,12,   2,15,8,6], [ 1,4,11,13,   12,3,7,14,   10,15,6,8,   0,5,9,2], [ 6,11,13,8,   1,4,10,7,   9,5,0,15,   14,2,3,12]];

S8 := [ [ 13,2,8,4,   6,15,11,1,   10,9,3,14,   5,0,12,7], [ 1,15,13,8,   10,3,7,4,   12,5,6,11,   0,14,9,2], [ 7,11,4,1,   9,12,14,2,   0,6,10,13,   15,3,5,8], [ 2,1,14,7,   4,10,8,13,   15,12,9,0,   3,5,6,11]];

S := [ S1,S2,S3,S4,S5,S6,S7,S8];