i find one solution that is similar- Q0 P K6 {9 }; E* I" H
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.... ! H" a) ]0 {- m! W' [$ amaybe 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...