stupid818

first, compare 6 and another 6. they must have difference.
# V' P, x/ K% t; Usecond, divide those 6 heavier one into two, each has 3. u will find difference again.2 ~& J3 i0 e  T0 W
third time, if u put 2 and they are equal, u will know the different one.5.39.217.76, N# C: A+ O4 R" |7 G( s
so easy....