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;
0,7,8,11,17,22,27,28;
0,12,18,23,27,29,30,31;
0,13,19,24,28,29,32,33;
0,4,8,14,20,25,30,32;
0,4,7,15,21,26,31,33;
1,2,34,35,36,37,38,39;
1,3,19,21,33,34,41,43;
1,4,32,33,35,45,49,50;
1,5,16,21,26,36,45,46;
1,6,37,43,46,49,51,52;
1,7,22,26,38,41,50,52;
1,8,16,19,22,32,39,51;
2,3,12,15,31,34,42,44;
2,4,25,26,36,42,47,50;
2,5,35,44,46,47,48,49;
2,6,10,15,26,38,45,49;
2,7,27,31,37,45,46,50;
2,8,10,12,25,27,39,48;
3,4,14,15,40,43,47,49;
3,5,24,26,33,42,49,52;
3,6,23,26,31,41,46,47;
3,7,17,21,40,44,46,52;
3,8,12,14,17,19,23,24;
4,5,20,21,34,35,40,42;
4,6,30,31,34,36,43,45;
5,6,36,38,40,47,52,53;
5,7,28,33,34,38,44,45;
5,8,16,20,24,28,48,53;
6,7,11,15,34,37,40,41;
6,8,10,11,23,30,51,53;
9,10,16,27,28,30,32,45;
9,11,18,27,37,39,51,54;
9,12,17,28,29,44,48,54;
9,13,20,32,35,39,48,55;
9,14,19,29,30,43,51,55;
9,15,21,35,37,43,44,45;
22,25,27,29,32,50,54,55;
10,14,24,32,48,49,51,54;
16,17,23,27,46,48,51,55;
10,13,22,28,38,39,53,54;
16,18,25,30,36,39,53,55;
11,12,19,20,28,30,34,39;
12,13,18,20,24,25,42,54;
17,18,22,24,29,51,52,53;
18,21,31,36,37,41,42,52;
11,13,18,19,22,23,41,55;
11,14,17,20,40,53,54,55;
13,15,33,35,38,41,42,47;
13,14,23,25,29,47,48,53;
29,31,33,43,44,47,50,52;
35,36,40,41,43,46,50,55;
37,38,40,42,44,49,50,54.