问题描述：
My first letter is in where ,not in there.
My second letter is in bad,not in bed.
My third letter is iin too ,not in zoo.
My last two letters are in chair ,not in pair.
What am
My second letter is in bad,not in bed.
My third letter is iin too ,not in zoo.
My last two letters are in chair ,not in pair.
What am
问题解答：
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