n56
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;
1,2,11,15,30,37,38,39;
1,3,16,21,26,37,44,45;
1,4,9,15,21,40,46,50;
1,5,38,40,42,44,49,51;
1,6,27,30,33,42,45,46;
1,7,23,26,33,39,50,51;
1,8,9,11,16,23,27,49;
2,3,10,15,26,43,50,55;
2,4,37,41,43,45,46,47;
2,5,24,26,35,39,41,44;
2,6,38,44,45,52,53,55;
2,7,28,30,35,46,50,53;
2,8,10,11,24,28,47,52;
3,4,32,33,36,45,50,53;
3,5,14,15,36,37,40,41;
3,6,18,21,33,40,51,55;
3,7,41,43,44,51,53,54;
3,8,10,14,16,18,32,54;
4,5,13,15,35,38,43,53;
4,6,20,21,36,37,38,42;
4,7,31,33,35,40,41,42;
4,8,9,13,20,31,32,47;
5,6,29,30,36,39,51,53;
5,7,22,26,30,37,42,43;
5,8,13,14,22,24,29,49;
6,7,37,39,40,44,46,48;
6,8,18,20,27,29,48,52;
7,8,22,23,28,31,48,54;
9,10,17,23,28,32,34,50;
9,12,19,27,28,46,47,48;
9,14,18,31,34,40,48,49;
11,12,23,24,29,34,39,48;
17,18,23,25,29,49,51,54;
12,13,28,29,32,52,53,54;
16,17,25,27,32,45,47,52;
10,12,18,19,25,34,52,55;
10,13,17,19,22,43,47,54;
11,13,17,20,34,38,49,52;
17,21,30,38,43,45,50,51;
34,35,36,38,39,40,50,55;
12,15,33,39,41,46,53,55;
11,14,16,20,22,37,47,48;
12,14,24,25,31,41,47,54;
19,21,35,42,43,44,46,55;
19,20,22,25,27,31,42,49;
25,26,36,41,42,45,51,55;
16,19,24,44,48,49,52,54.