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