i find one solution that is similar8 w! e6 a9 D0 U
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.... " q5 q% L; R0 J: U6 i( 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...