n48
1,2,3,4,5,6,7;
0,2,3,8,9,10,11;
0,1,7,8,12,13,14;
0,1,6,9,15,16,17;
0,10,12,15,18,19,20;
0,11,13,16,18,21,22;
0,3,7,17,19,21,23;
0,2,6,14,20,22,23;
1,2,9,14,24,25,26;
1,3,8,17,24,27,28;
1,4,12,15,25,27,29;
1,5,13,16,26,28,29;
2,4,10,20,25,30,31;
2,5,11,22,26,30,32;
2,7,8,23,24,31,32;
3,4,10,19,27,33,34;
3,5,11,21,28,33,35;
3,6,9,23,24,34,35;
4,5,29,30,33,36,37;
4,6,15,20,34,36,38;
4,7,12,19,31,37,38;
5,6,16,22,35,36,39;
5,7,13,21,32,37,39;
6,7,14,17,24,38,39;
8,9,14,17,23,40,41;
8,10,12,27,31,40,42;
8,11,13,28,32,41,42;
9,10,15,25,34,40,43;
9,11,16,26,35,41,43;
10,11,18,30,33,42,43;
12,13,18,29,37,42,44;
12,14,20,25,38,40,44;
13,14,22,26,39,41,44;
15,16,18,29,36,43,45;
15,17,19,27,38,40,45;
16,17,21,28,39,41,45;
18,19,21,33,37,45,46;
18,20,22,30,36,44,46;
19,20,23,31,34,40,46;
21,22,23,32,35,41,46;
24,25,27,31,34,38,47;
24,26,28,32,35,39,47;
25,26,29,30,43,44,47;
27,28,29,33,42,45,47;
30,31,32,37,42,46,47;
33,34,35,36,43,46,47;
36,37,38,39,44,45,47;
40,41,42,43,44,45,46.