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