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100
5 8
1 2
1 3
1 4
1 5
2 1
3 1
4 1
5 1
5 10
1 3
1 4
2 3
2 5
3 1
3 4
3 5
4 2
5 1
5 3
5 10
1 4
2 3
2 5
3 1
3 5
4 2
4 3
4 5
5 1
5 2
3 6
1 2
1 3
2 1
2 3
3 1
3 2
5 10
1 2
1 5
2 3
2 4
3 1
4 3
4 5
5 2
5 3
5 4
4 10
1 2
1 3
1 4
2 1
2 3
2 4
3 1
3 4
4 2
4 3
5 10
1 2
1 3
2 1
2 4
3 1
3 5
4 2
4 5
5 3
5 4
5 10
1 ...

Case #1: IMPOSSIBLE
1
1 
Case #2: 51
1 4 2 5 3 5 3 5 3 5 3 4 2 5 1 4 2 5 1 4 2 5 1 4 2 5 1 4 2 5 1 4 2 5 1 4 2 3 4 2 3 4 2 3 1 3 1 3 1 3 1 
Case #3: 51
1 4 5 2 5 2 5 2 3 5 2 3 5 2 3 5 2 3 1 4 5 2 3 1 4 5 1 4 5 1 4 5 1 4 3 1 4 3 1 4 2 3 1 4 2 3 1 4 2 3 1 
Case #4: 19
1 3 2 3 2 3 2 3 1 3 1 3 1 2 1 2 1...

wrong output format Expected 'Case' but found '1' (test case 2)

100
199 4980
1 95
1 96
1 105
1 124
1 130
1 131
1 135
1 137
1 139
1 140
1 141
1 147
1 155
1 172
1 174
1 179
1 183
1 188
1 193
1 196
1 197
2 3
2 5
2 13
2 14
2 17
2 20
2 24
2 26
2 30
2 41
2 44
2 45
2 52
2 56
2 67
2 70
2 71
2 74
2 78
2 84
2 85
2 90
2 92
2 93
2 97
2 107
2 111
2 113
2 122
2 124
2 128
2 13...

Case #1: IMPOSSIBLE
13334
1 197 89 197 89 197 89 197 89 197 89 197 89 197 89 197 89 197 89 197 89 197 89 197 89 197 89 197 89 197 89 197 89 197 89 197 89 197 89 197 89 197 89 197 89 197 89 197 89 197 89 197 89 197 89 197 89 197 89 197 89 197 89 197 89 197 89 197 89 197 89 197 89 197 89 197 89 197 89...

wrong output format Expected 'Case' but found '13334' (test case 2)