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