n40
1,2,3,4,5,6,7;
0,8,9,10,11,12,13;
0,8,14,15,16,17,18;
0,9,14,19,20,21,22;
0,10,15,19,23,24,25;
0,11,16,20,23,26,27;
0,12,17,21,24,26,28;
0,13,18,22,25,27,28;
1,2,10,11,23,29,30;
1,3,15,17,24,29,31;
1,4,8,11,17,26,32;
1,5,8,10,15,33,34;
1,6,23,24,26,33,35;
1,7,30,31,32,34,35;
2,3,19,22,25,30,31;
2,4,9,11,22,27,36;
2,5,23,25,27,33,37;
2,6,9,10,19,33,38;
2,7,29,31,36,37,38;
3,4,14,17,22,28,39;
3,5,24,25,28,34,35;
3,6,29,30,35,38,39;
3,7,14,15,19,34,38;
4,5,8,12,16,27,28;
4,6,9,12,20,26,39;
4,7,14,16,20,32,36;
5,6,10,12,24,29,37;
5,7,15,16,23,29,35;
6,7,19,20,23,30,37;
8,9,18,21,26,27,33;
8,13,14,21,28,32,34;
9,13,14,18,36,38,39;
10,13,25,30,34,37,38;
11,12,16,17,29,36,39;
11,13,20,22,30,32,39;
12,13,20,21,27,36,37;
15,18,25,31,33,35,38;
16,18,26,28,32,35,39;
17,18,21,22,31,32,36;
19,21,24,31,33,34,37.