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