n52
1,2,3,4,5,6,7,8;
0,4,5,9,10,11,12,13;
0,3,5,14,15,16,17,18;
0,2,4,14,19,20,21,22;
0,1,3,9,19,23,24,25;
0,1,2,10,15,26,27,28;
0,11,16,20,23,26,29,30;
0,12,17,21,24,27,29,31;
0,13,18,22,25,28,30,31;
1,4,12,19,27,34,35,36;
1,5,11,15,23,32,33,36;
1,6,10,13,25,32,34,37;
1,7,9,13,28,33,35,38;
1,8,11,12,24,26,37,38;
2,3,17,19,27,39,44,45;
2,5,10,16,20,32,40,45;
2,6,15,18,22,32,41,44;
2,7,14,18,28,39,40,42;
2,8,16,17,21,26,41,42;
3,4,9,14,35,39,43,46;
3,6,15,24,27,33,35,37;
3,7,18,23,30,33,43,44;
3,8,16,25,30,37,45,46;
4,6,10,21,27,39,40,41;
4,7,13,20,30,34,40,46;
4,8,11,22,30,36,41,43;
5,6,13,18,33,40,47,48;
5,7,9,14,20,23,47,49;
5,8,12,17,36,45,48,49;
6,7,34,35,39,44,48,49;
6,8,21,22,24,25,47,49;
7,8,38,42,43,46,47,48;
10,11,15,16,37,41,50,51;
10,12,20,21,26,34,49,50;
9,11,24,29,33,43,47,51;
9,12,19,20,29,38,45,46;
9,10,25,28,39,45,49,51;
11,13,20,22,32,38,47,50;
12,13,31,35,37,46,48,50;
14,17,19,23,29,36,42,43;
15,17,23,24,26,44,49,51;
16,18,23,25,32,42,47,51;
17,18,31,39,41,43,48,51;
19,21,25,31,34,39,42,46;
14,16,21,29,40,46,47,50;
14,15,22,28,35,36,49,50;
19,22,24,31,35,38,43,44;
26,27,30,31,34,37,41,44;
26,28,29,31,38,42,50,51;
27,28,29,30,33,36,40,45;
32,33,37,38,44,45,48,51;
32,34,36,40,41,42,48,50.