Was ist rather this you wanted? 
my %Cls = ('P' => 'a',
           'N' => 'b',
           'U' => 'c');
print %Cls.": \n\n";
foreach $a (keys(%Cls)) {
    print "$a => $Cls{$a}\n";
}

In reply to Re: Hash problem: each() failure by Anonymous Monk
in thread Hash problem: each() failure by Anonymous Monk

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