1,2,3,4,5,6,7,8,12,13,14,15,16,17,18
1,2,3,4,5,6,7,9,12,13,14,15,16,17,19
1,2,3,4,5,6,7,10,12,13,14,15,16,17,20
1,2,3,4,5,6,7,11,12,14,15,16,17,18,19
1,2,4,5,6,7,8,9,12,14,15,16,17,18,20
1,2,4,5,6,7,8,10,12,15,16,17,18,19,20
1,2,4,5,6,7,8,11,13,14,15,16,17,18,19
1,2,5,6,7,8,9,10,13,14,15,16,17,18,20
1,2,5,6,7,8,9,11,13,15,16,17,18,19,20
1,2,6,7,8,9,10,11,14,15,16,17,18,19,20