1,2,0,0,0,0,0
2,1,0,1,0,0,0
3,1,0,0,0,0,0
4,1,0,0,1,0,0
5,1,0,0,1,0,0
3884,1,0,0,1,0,0
3885,1,0,1,0,0,0
