C(31,8,2) = 20
Method of Construction: simple construction: deleted element from c(v+1,k,t) covering
Lower Bound: Schonheim
2 3 5 6 18 19 21 22
1 2 4 7 17 18 20 23
4 5 9 11 20 21 25 27
4 6 8 12 20 22 24 28
1 10 11 12 17 26 27 28
7 8 9 13 23 24 25 29
3 4 10 13 19 20 26 29
5 7 10 14 21 23 26 30
3 8 11 14 19 24 27 30
2 9 12 14 18 25 28 30
1 6 13 14 17 22 29 30
1 3 9 15 17 19 25 31
2 8 10 15 18 24 26 31
6 7 11 15 22 23 27 31
5 12 13 15 21 28 29 31
1 5 8 16 17 21 24 30
6 9 10 16 22 25 26 27
3 7 12 16 19 23 24 28
2 11 13 16 18 19 27 29
4 14 15 16 20 22 30 31