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