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