n28
1,2,3,4,5;
0,6,7,8,9;
0,6,10,11,12;
0,7,10,13,14;
0,8,11,13,15;
0,9,12,14,15;
1,2,16,17,18;
1,3,16,19,20;
1,4,17,19,21;
1,5,18,20,21;
2,3,18,20,22;
2,4,17,22,23;
2,5,16,20,23;
3,4,19,22,24;
3,5,16,18,24;
4,5,21,23,24;
6,7,12,14,25;
6,8,11,25,26;
6,9,10,14,26;
7,8,13,25,27;
7,9,10,12,27;
8,9,15,26,27;
10,11,13,26,27;
11,12,15,25,27;
13,14,15,25,26;
16,17,19,23,24;
17,18,21,22,24;
19,20,21,22,23.