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