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