n14
1,2,3,4;
0,5,6,7;
0,5,8,9;
0,6,8,10;
0,7,9,10;
1,2,11,12;
1,3,11,13;
1,4,12,13;
2,3,12,13;
2,4,11,13;
3,4,11,12;
5,6,9,10;
5,7,8,10;
6,7,8,9.