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