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