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