n80
1,2,3,4,5,6,7,8;
0,4,6,9,10,11,12,13;
0,4,5,14,15,16,17,18;
0,5,6,19,20,21,22,23;
0,1,2,9,14,19,24,25;
0,2,3,10,15,20,26,27;
0,1,3,11,16,21,28,29;
0,12,17,22,24,26,28,30;
0,13,18,23,25,27,29,30;
1,4,11,14,31,43,44,45;
1,5,16,19,31,32,33,34;
1,6,9,21,32,43,46,48;
1,7,25,29,33,35,44,46;
1,8,24,28,34,35,45,48;
2,4,9,15,31,32,37,38;
2,5,14,20,31,50,54,57;
2,6,10,19,32,51,53,54;
2,7,25,27,37,39,50,51;
2,8,24,26,38,39,53,57;
3,4,10,16,32,43,47,49;
3,5,15,21,32,52,54,55;
3,6,11,20,43,54,56,58;
3,7,27,29,41,49,52,58;
3,8,26,28,41,47,55,56;
4,7,13,18,37,40,44,49;
4,8,12,17,38,40,45,47;
5,7,18,23,33,36,50,52;
5,8,17,22,34,36,55,57;
6,7,13,23,42,46,51,58;
6,8,12,22,42,48,53,56;
7,8,35,36,39,40,41,42;
9,10,14,15,43,54,61,62;
10,11,14,16,19,20,59,60;
10,12,26,47,53,59,61,63;
10,13,27,49,51,60,62,63;
12,13,30,40,42,63,65,66;
26,27,30,39,41,63,70,71;
14,17,24,45,57,59,61,64;
14,18,25,44,50,60,62,64;
17,18,30,36,40,64,70,72;
24,25,30,35,39,64,65,67;
22,23,30,36,42,67,71,73;
28,29,30,35,41,66,72,73;
9,11,19,21,31,54,68,69;
9,12,24,38,48,61,65,68;
9,13,25,37,46,62,65,69;
11,12,28,45,56,59,66,68;
19,23,25,33,51,60,67,69;
11,13,29,44,58,60,66,69;
19,22,24,34,53,59,67,68;
15,17,26,38,55,61,70,74;
16,17,28,34,47,59,72,74;
20,22,26,56,57,59,71,74;
16,18,29,33,49,60,72,75;
15,16,20,21,31,43,74,75;
20,23,27,50,58,60,71,75;
21,23,29,46,52,69,73,75;
15,18,27,37,52,62,70,75;
21,22,28,48,55,68,73,74;
32,33,37,46,49,51,52,76;
32,34,38,47,48,53,55,76;
31,33,37,44,50,69,75,77;
31,34,38,45,57,68,74,77;
33,34,35,36,67,72,76,77;
37,38,39,40,65,70,76,77;
35,40,44,45,64,66,77,78;
35,42,46,48,65,73,76,78;
40,41,47,49,63,72,76,78;
43,44,46,49,58,62,75,78;
43,45,47,48,56,61,74,78;
36,39,50,57,64,71,77,79;
36,41,52,55,70,73,76,79;
39,42,51,53,63,67,76,79;
41,42,56,58,66,71,78,79;
50,51,52,54,58,62,69,79;
53,54,55,56,57,61,68,79;
59,60,63,64,66,67,71,72;
61,62,63,64,65,70,78,79;
65,66,67,68,69,73,77,79;
70,71,72,73,74,75,77,78.