i find one solution that is similar5 G2 c5 v% e2 D4 O4 G5 L! P. h
but i can't specify the heavier one is abnormal or the lighter one is abnormal when the case that has only two balls left....tvb now,tvbnow,bttvb( e+ ^ [& k& k0 d* n
maybe there is a better one, let me see sin |