Except that OP says

And how do I check if a value exists? I can not reverse the hash since it has many of the same values.

in which case leaving %rhash in its original form allows the lookup that OP wants - no reversing required.

DWIM is Perl's answer to Gödel

In reply to Re^3: Confusion due to hash by GrandFather
in thread Confusion due to hash by tamaguchi

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