i find one solution that is similar6 o2 B/ n, z1 `* o
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....tvb now,tvbnow,bttvb6 ]' a! \9 c4 x' o, y4 v+ ^8 @+ x3 a
maybe there is a better one, let me see sin |