7
01 1,2
02 1,2,3,5
12 1,2,3,4,5,6,7,8,9,10,11,12,13,14,15,16,17
12 23
05 4,6,7
03 1,2,3,4,5,6,7,8,9,10,11,12
11 4,5,6
