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