C(10,9,3) = 4
Method of Construction: lex covering
Lower Bound: Schonheim
1 2 3 4 5 6 7 8 9 1 2 3 4 5 6 7 8 10 1 2 3 4 5 6 7 9 10 1 2 3 4 5 6 8 9 10