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  1. or download this
    $hash{key1}{value1} = 1;
$hash{key1}{value2} = 2;
$hash{key2}{value3) = 1;
  2. or download this
    my $check = scalar keys %{$hash{$key}};
  3. or download this
    forach my $k (keys %{$hash{$key}}) {
 # $k == the value i am looking for.
}