stupid818

first, compare 6 and another 6. they must have difference. 5 O% X: N- G4 b/ V/ d
second, divide those 6 heavier one into two, each has 3. u will find difference again.
' h1 y5 j% K, t  v9 ~tvb now,tvbnow,bttvbthird time, if u put 2 and they are equal, u will know the different one.
8 [) n# B" ?# n' `so easy....