i find one solution that is similar
+ I& M6 C$ j, _7 i5 K5.39.217.77:8898but i can't specify the heavier one is abnormal or the lighter one is abnormal when the case that has only two balls left....5.39.217.77:8898/ |* Z3 Q* E: t/ x5 x; W
maybe there is a better one, let me see sin |