i find one solution that is similar5 g5 C" A0 X$ b0 w8 I) n. x2 [
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.... i. _: ]$ A* m5 }$ J
maybe there is a better one, let me see sin
actually this question always have someone asked, the calculation is very complicated, should give a no. of each ball, and first weight it in 6-6, and .... forgot...