C(14,12,2) = 3

Created by LJCR

Method of Construction: Multiple of (7,6,2) covering

 1  2  3  4  5  6  8  9 10 11 12 13 
 1  2  3  4  5  7  8  9 10 11 12 14 
 1  2  3  4  6  7  8  9 10 11 13 14