i find one solution that is similar
% f3 F, A! D' K1 j7 k$ mbut 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* _, {, [, m' [7 i) k& M2 z* n
maybe there is a better one, let me see sin |