i find one solution that is similar
$ X% f) U9 [8 f. etvb now,tvbnow,bttvbbut i can't specify the heavier one is abnormal or the lighter one is abnormal when the case that has only two balls left....
, M0 m; G$ u( \- Stvb now,tvbnow,bttvbmaybe there is a better one, let me see sin |