....your Front Pairs are these---
00 = 13 14 23 24 33 34 43 44
01 = 14 15 24 25 34 35 44 45
02 = 15 16 25 26 35 36 45 46
03 = 16 17 26 27 36 37 46 47
04 = 17 18 27 28 37 38 47 48
05 = 18 19 28 29 38 39 48 49
06 = 09 10 19 20 29 30 39 40
07 = 10 11 20 21 30 31 40 41
08 = 11 12 21 22 31 32 41 42
09 = 12 13 22 23 32 33 42 43
10 = 23 24 33 34 43 44 53 54
11 = 24 25 34 35 44 45 54 55
12 = 25 26 35 36 45 46 55 56
13 = 26 27 36 37 46 47 56 57
14 = 27 28 37 38 47 48 57 58
15 = 28 29 38 39 48 49 58 59
16 = 19 20 29 30 39 40 49 50
17 = 20 21 30 31 40 41 50 51
18 = 21 22 31 32 41 42 51 52
19 = 22 23 32 33 42 43 52 53
20 = 33 34 43 44 53 54 63 64
21 = 34 35 44 45 54 55 64 65
22 = 35 36 45 46 55 56 65 66
23 = 36 37 46 47 56 57 66 67
24 = 37 38 47 48 57 58 67 68
25 = 38 39 48 49 58 59 68 69
26 = 29 30 39 40 49 50 59 60
27 = 30 31 40 41 50 51 60 61
28 = 31 32 41 42 51 52 61 62
29 = 32 33 42 43 52 53 62 63
30 = 43 44 53 54 63 64 73 74
31 = 44 45 54 55 64 65 74 75
32 = 45 46 55 56 65 66 75 76
33 = 46 47 56 57 66 67 76 77
34 = 47 48 57 58 67 68 77 78
35 = 48 49 58 59 68 69 78 79
36 = 39 40 49 50 59 60 69 70
37 = 40 41 50 51 60 61 70 71
38 = 41 42 51 52 61 62 71 72
39 = 42 43 52 53 62 63 72 73
40 = 53 54 63 64 73 74 83 84
41 = 54 55 64 65 74 75 84 85
42 = 55 56 65 66 75 76 85 86
43 = 56 57 66 67 76 77 86 87
44 = 57 58 67 68 77 78 87 88
45 = 58 59 68 69 78 79 88 89
46 = 49 50 59 60 69 70 79 80
47 = 50 51 60 61 70 71 80 81
48 = 51 52 61 62 71 72 81 82
49 = 52 53 62 63 72 73 82 83
50 = 63 64 73 74 83 84 93 94
51 = 64 65 74 75 84 85 94 95
52 = 65 66 75 76 85 86 95 96
53 = 66 67 76 77 86 87 96 97
54 = 67 68 77 78 87 88 97 98
55 = 68 69 78 79 88 89 98 99
56 = 59 60 69 70 79 80 89 90
57 = 60 61 70 71 80 81 90 91
58 = 61 62 71 72 81 82 91 92
59 = 62 63 72 73 82 83 92 93
60 = 73 74 83 84 93 94 03 04
61 = 74 75 84 85 94 95 04 05
62 = 75 76 85 86 95 96 05 06
63 = 76 77 86 87 96 97 06 07
64 = 77 78 87 88 97 98 07 08
65 = 78 79 88 89 98 99 08 09
66 = 69 70 79 80 89 90 99 00
67 = 70 71 80 81 90 91 00 01
68 = 71 72 81 82 91 92 01 02
69 = 72 73 82 83 92 93 02 03
70 = 83 84 93 94 03 04 13 14
71 = 84 85 94 95 04 05 14 15
72 = 85 86 95 96 05 06 15 16
73 = 86 87 96 97 06 07 16 17
74 = 87 88 97 98 07 08 17 18
75 = 88 89 98 99 08 09 18 19
76 = 79 80 89 90 99 00 09 10
77 = 80 81 90 91 00 01 10 11
78 = 81 82 91 92 01 02 11 12
79 = 82 83 92 93 02 03 12 13
80 = 93 94 03 04 13 14 23 24
81 = 94 95 04 05 14 15 24 25
82 = 95 96 05 06 15 16 25 26
83 = 96 97 06 07 16 17 26 27
84 = 97 98 07 08 17 18 27 28
85 = 98 99 08 09 18 19 28 29
86 = 89 90 99 00 09 10 19 20
87 = 90 91 00 01 10 11 20 21
88 = 91 92 01 02 11 12 21 22
89 = 92 93 02 03 12 13 22 23
90 = 03 04 13 14 23 24 33 34
91 = 04 05 14 15 24 25 34 35
92 = 05 06 15 16 25 26 35 36
93 = 06 07 16 17 26 27 36 37
94 = 07 08 17 18 27 28 37 38
95 = 08 09 18 19 28 29 38 39
96 = 99 00 09 10 19 20 29 30
97 = 00 01 10 11 20 21 30 31
98 = 01 02 11 12 21 22 31 32
99 = 02 03 12 13 22 23 32 33
If anyone needs an example, please ask away!