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