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