n42
1,2,3,4,5,6,7,8;
0,9,10,11,12,13,14,15;
0,4,8,9,16,17,18,19;
0,10,16,20,21,22,23,24;
0,2,8,11,20,25,26,27;
0,12,17,21,25,28,29,30;
0,13,18,22,26,28,31,32;
0,14,19,23,27,29,31,33;
0,2,4,15,24,30,32,33;
1,2,20,22,28,30,34,35;
1,3,25,27,30,33,36,37;
1,4,17,22,24,26,27,29;
1,5,16,18,20,26,36,39;
1,6,23,24,33,34,39,40;
1,7,17,18,28,37,38,40;
1,8,16,23,25,29,35,38;
2,3,12,15,21,22,27,31;
2,5,11,14,31,32,34,39;
2,6,12,14,25,33,35,41;
2,7,21,24,26,28,39,41;
3,4,9,12,29,33,38,40;
3,5,16,19,22,29,30,32;
3,6,9,11,16,21,25,39;
3,7,13,15,32,36,39,40;
3,8,11,13,19,31,37,38;
4,5,10,15,18,22,34,40;
4,6,11,12,19,27,30,34;
4,7,10,11,16,26,32,38;
5,6,9,14,19,36,37,40;
5,7,11,15,20,21,30,37;
5,8,9,10,21,26,29,31;
6,7,16,17,24,30,35,36;
6,8,17,21,23,27,37,41;
7,8,10,13,18,20,35,41;
9,13,17,25,26,36,38,41;
9,15,18,31,33,37,39,41;
10,12,23,28,31,34,38,41;
10,14,24,28,29,32,35,40;
14,15,20,24,27,34,36,41;
12,13,17,19,22,23,35,40;
13,14,20,23,25,28,37,39;
18,19,32,33,34,35,36,38.