10,8,(4,7,11)
7,9,10
,,5,2,(11,9,15)
1
1,14,3,(8,2,11)
7,1,(5,17,12)
5,9,13
1,5,7,(3,14,6,16)
回避
12,7,8,(14,4,5,11,1)
(11)
16,1,10,14,(3,6,4)
4,(12,2,7,11)