first, compare 6 and another 6. they must have difference.
3 Y! B7 x/ {8 k. @' n+ P, v9 Y5.39.217.76second, divide those 6 heavier one into two, each has 3. u will find difference again.公仔箱論壇5 Y& z" p, J: l0 ?( m
third time, if u put 2 and they are equal, u will know the different one.
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