C(12,11,4) = 5

Method of Construction: lex covering

Lower Bound: Schonheim

  1  2  3  4  5  6  7  8  9 10 11
  1  2  3  4  5  6  7  8  9 10 12
  1  2  3  4  5  6  7  8  9 11 12
  1  2  3  4  5  6  7  8 10 11 12
  1  2  3  4  5  6  7  9 10 11 12