n72
1,2,3,4,5,6,7,8;
0,7,8,9,10,11,12,13;
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;
0,13,17,22,26,29,32,33;
0,1,8,18,23,27,30,32;
0,1,7,19,24,28,31,33;
1,2,18,19,34,35,36,37;
1,3,23,24,34,38,40,41;
1,4,27,28,35,38,42,43;
1,5,30,31,36,41,42,44;
1,6,32,33,37,40,43,44;
2,3,35,41,42,45,46,47;
2,4,34,40,43,45,48,49;
2,5,37,39,42,43,50,51;
2,6,36,39,40,41,52,53;
2,7,9,19,46,48,50,52;
2,8,9,18,47,49,51,53;
3,4,39,40,42,44,54,55;
3,5,34,37,44,45,56,57;
3,6,35,37,38,39,58,59;
3,7,10,24,46,54,56,58;
3,8,10,23,47,55,57,59;
4,5,34,36,38,39,60,61;
4,6,35,36,44,45,62,63;
4,7,11,28,48,54,60,62;
4,8,11,27,49,55,61,63;
5,6,38,41,43,45,64,65;
5,7,12,31,50,56,60,64;
5,8,12,30,51,57,61,65;
6,7,13,33,52,58,62,64;
6,8,13,32,53,59,63,65;
9,10,15,21,25,46,47,66;
9,11,14,22,26,48,49,66;
9,12,17,25,26,50,51,67;
9,13,16,21,22,52,53,67;
10,11,22,25,29,54,55,67;
16,17,20,22,25,66,68,69;
10,13,15,17,20,58,59,67;
10,12,14,17,29,56,57,66;
11,12,14,16,20,60,61,67;
11,13,15,16,29,62,63,66;
12,13,20,21,26,64,65,66;
14,15,21,26,29,67,70,71;
14,18,23,34,49,57,61,70;
14,19,24,34,48,56,60,71;
15,18,27,35,47,59,63,70;
15,19,28,35,46,58,62,71;
16,18,30,36,53,61,63,68;
16,19,31,36,52,60,62,69;
17,18,32,37,51,57,59,68;
17,19,33,37,50,56,58,69;
20,23,27,38,59,61,65,68;
20,24,28,38,58,60,64,69;
21,23,30,41,47,53,65,70;
21,24,31,41,46,52,64,71;
22,23,32,40,49,53,55,68;
22,24,33,40,48,52,54,69;
25,27,30,42,47,51,55,68;
25,28,31,42,46,50,54,69;
26,27,32,43,49,51,65,70;
26,28,33,43,48,50,64,71;
29,30,32,44,55,57,63,70;
29,31,33,44,54,56,62,71;
34,35,39,41,43,44,70,71;
36,37,38,40,42,45,68,69;
39,50,52,54,58,60,67,71;
39,51,53,55,59,61,67,70;
45,46,48,56,62,64,66,69;
45,47,49,57,63,65,66,68.