14A,14B,if 13A,15B Ok. There are C(8,3)=56trics every side use C(6,1)=6 times,6*28/3=56,
If here has AAA, shoud be has BBB,as n(A)<=n(B). 14A,14B maybe doesn't exit,doesn't matter,...for Ex, I prove the life span for man is short for tree, I say man's span is 200 years,...OK.
