C(11,6,2) = 6
Method of Construction: lex covering
Lower Bound: Bounds for fixed number of blocks
1 2 3 4 5 6 1 7 8 9 10 11 2 3 4 7 8 9 2 3 4 5 10 11 5 6 7 8 9 10 1 2 3 4 6 11