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

wrong output format Expected integer, but "Case" found (test case 25)

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
Case #2: IMPOSSIBLE
Case #3: 1000001
1 167 158 175 190 187 186 181 178 171 184 185 181 178 171 166 164 162 148 165 157 138 134 117 99 91 118 121 123 128 152 155 144 165 157 138 134 117 99 91 118 121 123 128 152 155 144 165 157 138 134 117 99 91 118 121 123 128 152 155 144 165 157...

wrong output format Expected integer, but "Case" found (test case 27)