1  2  3  4  5  6  7  8  9  A  B  C  D 
   x--------------------------------------- 
 1 |  1  2  3  4  5  6  7  8  9  A  B  C  D
 2 |  2  4  6  8  A  C 10 12 14 16 18 1A 1C
 3 |  3  6  9  C 11 14 17 1A 1D 22 25 28 2B
 4 |  4  8  C 12 16 1A 20 24 28 2C 32 36 3A
 5 |  5  A 11 16 1B 22 27 2C 33 38 3D 44 49
 6 |  6  C 14 1A 22 28 30 36 3C 44 4A 52 58
 7 |  7 10 17 20 27 30 37 40 47 50 57 60 67
 8 |  8 12 1A 24 2C 36 40 48 52 5A 64 6C 76
 9 |  9 14 1D 28 33 3C 47 52 5B 66 71 7A 85
 A |  A 16 22 2C 38 44 50 5A 66 72 7C 88 94
 B |  B 18 25 32 3D 4A 57 64 71 7C 89 96 A3
 C |  C 1A 28 36 44 52 60 6C 7A 88 96 A4 B2
 D |  D 1C 2B 3A 49 58 67 76 85 94 A3 B2 C1