i find one solution that is similar
6 Y2 k& O; c* c/ V3 L$ Z/ ubut i can't specify the heavier one is abnormal or the lighter one is abnormal when the case that has only two balls left....
, d' ^% E" E; @ P' B: N2 ?tvb now,tvbnow,bttvbmaybe there is a better one, let me see sin |