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