hash and parsing help

[Saurabh Singhvi]

Hi

I have generated a hash from data 3 levels deep
meaning,

 $hash{$key1}{$key2}{$integer}

is how i would get a value.

for each key2 there are some no. of values which are same
in number for all keys under one key1 but may be different
under other key1's.

Now the data values are of the form :
                           0
1                    2
key21       NYIFGRTLGAGSFGVVRQA TNEDVAIKILL QLQMLYE
key22       DFEILKVIGRGAFSEVAVV TGQVYAMKIMN EVSCFRE
key23       TRKFKVELGRGESGTVYKG DDRHVAVKKLE GKEVFQA
key24       QIRLTGRVGSGRFGNVSRG RGEAVAVKVFN DEPAFHK

this whole under say key11.

Now I want to recursively compare all values of all key2's by some method,
i just need a way to get them recursively get them.

And this, i want to be able to do for all key1's.

So plz tell me how to do it.

thanks
Saurabh