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