n80
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;
1,3,16,29,37,39,44,45;
1,4,17,31,35,39,40,41;
1,5,15,26,35,42,45,46;
1,6,14,22,37,41,42,43;
1,8,18,33,40,43,44,46;
2,3,12,31,39,47,52,53;
2,4,11,29,34,39,56,57;
2,5,9,22,34,42,53,55;
2,6,10,26,42,47,57,58;
2,8,13,33,52,55,56,58;
3,4,34,37,41,51,53,54;
3,5,28,29,31,34,35,36;
3,6,35,41,45,47,48,49;
3,7,12,16,28,48,50,51;
3,8,36,44,49,50,52,54;
4,5,25,26,31,53,57,59;
4,6,24,26,29,35,37,38;
4,7,11,17,24,25,51,60;
4,8,38,40,54,56,59,60;
5,6,20,22,29,45,57,61;
5,7,9,15,20,25,28,62;
5,8,36,46,55,59,61,62;
6,7,10,14,20,24,48,63;
6,8,38,43,49,58,61,63;
7,8,13,18,50,60,62,63;
15,16,19,20,45,48,64,67;
10,11,20,21,25,57,64,75;
20,23,30,61,62,63,67,75;
9,12,19,25,51,53,64,72;
25,27,32,59,60,62,72,75;
9,10,14,15,42,64,65,66;
10,13,27,58,63,66,73,75;
10,12,19,21,47,48,65,73;
11,12,16,17,39,64,65,70;
12,13,32,50,52,70,72,73;
9,13,23,55,62,66,71,72;
9,11,21,28,34,51,65,71;
11,13,30,56,60,70,71,75;
14,17,21,41,48,51,64,76;
21,22,31,34,41,47,57,77;
21,23,32,71,73,75,76,77;
22,23,33,43,55,61,74,77;
19,22,26,37,45,47,53,74;
14,18,23,43,63,66,68,76;
14,16,19,24,37,51,65,68;
19,23,27,67,68,72,73,74;
16,18,30,44,50,67,68,70;
15,18,27,46,62,66,67,69;
15,17,24,28,35,48,65,69;
17,18,32,40,60,69,70,76;
24,27,30,38,60,63,68,69;
26,27,33,38,46,58,59,74;
28,30,32,36,50,62,69,71;
29,30,33,36,38,44,56,61;
31,32,33,36,40,52,59,77;
34,35,37,39,42,47,65,78;
39,41,42,45,53,57,64,79;
39,40,44,52,56,70,78,79;
34,36,54,55,56,71,77,78;
52,53,54,55,59,72,74,79;
56,57,58,59,61,75,77,79;
42,43,46,55,58,66,78,79;
44,45,46,49,61,67,74,79;
37,38,43,44,54,68,74,78;
40,41,43,49,54,76,77,79;
50,51,54,60,68,71,72,76;
35,36,38,40,46,49,69,78;
47,49,52,58,73,74,77,78;
48,49,50,63,67,69,73,76;
64,66,67,70,72,75,76,79;
65,66,68,69,70,71,73,78.