n84
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;
1,3,37,48,51,62,63,65;
1,4,38,45,48,57,67,69;
1,5,39,45,58,63,66,70;
1,6,40,55,62,68,69,70;
1,7,41,51,53,55,57,58;
1,8,42,53,65,66,67,68;
2,3,38,55,57,60,61,62;
2,4,37,46,50,62,67,68;
2,5,40,44,52,61,66,68;
2,6,41,44,46,54,55,56;
2,7,39,54,57,59,66,67;
2,8,42,50,52,56,59,60;
3,4,46,47,51,56,57,59;
3,5,37,38,43,44,45,46;
3,6,43,49,56,60,63,70;
3,7,44,47,55,65,66,70;
3,8,45,48,49,59,61,66;
4,5,38,40,51,58,62,64;
4,6,37,40,44,47,48,49;
4,7,49,50,58,59,69,70;
4,8,44,45,56,64,68,70;
5,6,46,47,63,64,65,68;
5,7,37,39,47,50,51,52;
5,8,43,50,61,62,65,70;
6,7,37,41,43,65,67,69;
6,8,48,54,60,62,64,67;
7,8,43,44,49,52,53,54;
9,10,17,23,28,32,34,71;
9,11,16,23,27,72,73,74;
9,12,20,32,72,75,76,77;
9,13,18,27,28,75,78,79;
9,14,19,34,73,76,78,80;
9,15,21,71,74,77,79,80;
23,24,33,34,36,72,76,81;
18,19,23,25,28,30,36,73;
11,12,23,26,30,71,76,80;
17,19,22,23,31,74,80,81;
22,25,28,31,32,75,82,83;
10,11,26,28,35,73,78,82;
24,26,28,29,36,71,79,83;
17,21,29,32,33,72,74,83;
10,14,22,27,32,74,77,78;
18,21,32,36,71,76,78,82;
14,15,36,72,73,77,82,83;
19,20,35,36,77,78,79,81;
13,14,16,19,25,74,79,83;
19,21,22,24,30,76,77,83;
11,14,16,20,22,76,81,82;
12,14,27,29,72,79,80,81;
20,21,22,26,29,75,78,80;
16,21,24,35,72,75,79,82;
16,18,26,33,73,75,76,83;
10,13,16,17,27,33,35,81;
10,12,24,31,71,77,81,82;
27,30,31,35,73,75,77,80;
10,15,25,31,33,34,73,74;
12,15,18,20,25,26,79,82;
11,15,17,20,34,35,72,80;
13,15,17,18,30,31,71,83;
11,13,29,34,71,74,78,81;
12,13,24,25,29,30,33,75;
37,42,45,49,52,63,68,69;
38,39,43,50,53,58,60,67;
38,41,44,48,53,61,64,65;
38,42,46,50,51,55,65,69;
39,40,47,59,60,61,64,70;
39,41,43,45,52,56,57,61;
39,42,51,53,54,56,63,64;
40,41,48,51,52,54,59,69;
40,42,49,54,55,58,60,66;
41,42,45,46,58,59,64,67;
43,46,54,57,58,62,63,69;
47,48,52,53,57,60,63,66;
47,49,50,53,55,56,61,68.