i find one solution that is similar
: ?% i1 s) o: {; q9 |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....
. H2 j% r3 m8 F5 P0 c9 Mtvb now,tvbnow,bttvbmaybe there is a better one, let me see sin |