INPUT

10
3
1, 2, 3
3
2, 1, 4, 3, 6, 10, 2 
1, 5, 7, 2
2, 3, 7, 3, 5, 9, 2


OUTPUT

5, 1, 8
2, 3, 4
6, 7
6, 7
3, 4, 6
7, 8
7