n80
1,2,3,4,5,6,7,8;
0,4,6,9,10,11,12,13;
0,9,14,15,16,17,18,19;
0,10,14,20,21,22,23,24;
0,1,6,15,20,25,26,27;
0,11,16,21,25,28,29,30;
0,1,4,17,22,28,31,32;
0,12,18,23,26,29,31,33;
0,13,19,24,27,30,32,33;
1,2,20,22,34,35,36,37;
1,3,25,28,34,38,40,41;
1,5,15,17,35,38,42,43;
1,7,27,32,36,40,42,44;
1,8,26,31,37,41,43,44;
2,3,16,17,28,35,45,46;
2,4,11,28,34,39,47,48;
2,5,14,17,22,39,49,50;
2,6,11,14,16,20,51,52;
2,7,36,45,47,49,51,53;
2,8,37,46,48,50,52,53;
3,4,9,17,38,39,61,62;
3,5,34,35,39,54,55,56;
3,6,9,16,25,54,64,65;
3,7,40,45,55,61,64,66;
3,8,41,46,56,62,65,66;
4,5,10,22,34,38,57,58;
4,7,13,32,47,57,62,66;
4,8,12,31,48,58,61,66;
5,6,10,14,15,54,59,60;
5,7,42,50,53,55,57,59;
5,8,43,49,53,56,58,60;
6,7,13,27,51,59,63,64;
6,8,12,26,52,60,63,65;
7,8,44,49,50,61,62,63;
9,10,15,21,25,38,71,72;
9,11,14,21,39,54,74,75;
9,12,18,61,63,64,71,74;
9,13,19,62,63,65,72,75;
10,11,20,25,34,54,68,69;
15,16,20,21,35,54,67,70;
10,12,23,58,60,69,71,77;
10,13,24,57,59,68,72,77;
11,12,29,48,52,68,74,77;
11,13,30,47,51,69,75,77;
12,13,33,64,65,66,68,69;
14,18,23,49,51,60,63,75;
14,19,24,50,52,59,63,74;
15,18,26,43,60,67,71,73;
15,19,27,42,59,70,72,73;
16,18,30,33,45,51,64,67;
16,19,29,33,46,52,65,70;
17,18,31,43,45,49,61,76;
17,19,32,42,46,50,62,76;
18,19,29,30,73,74,75,76;
21,22,28,35,38,39,78,79;
21,23,29,70,72,75,77,78;
21,24,30,67,71,74,77,79;
25,26,29,41,65,68,72,73;
25,27,30,40,64,69,71,73;
28,29,31,41,46,48,76,78;
28,30,32,40,45,47,76,79;
20,23,27,33,36,51,69,70;
20,24,26,33,37,52,67,68;
31,32,33,36,37,45,46,66;
22,23,31,36,44,49,58,78;
22,24,32,37,44,50,57,79;
23,24,26,27,44,63,71,72;
39,47,49,56,62,75,76,78;
38,41,42,44,57,62,72,78;
38,40,43,44,58,61,71,79;
39,48,50,55,61,74,76,79;
34,36,40,47,56,58,66,69;
34,37,41,48,55,57,66,68;
47,48,53,57,58,77,78,79;
35,36,42,46,53,56,70,78;
35,37,43,45,53,55,67,79;
51,52,53,59,60,67,70,77;
40,41,42,43,55,56,73,76;
54,55,59,64,67,68,73,74;
54,56,60,65,69,70,73,75.