i find one solution that is similartvb now,tvbnow,bttvb' Z8 }8 n. y4 s# Y4 i
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....
u3 N. B _9 k% D8 n/ _! @. hmaybe there is a better one, let me see sin |