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  1. or download this
       my %hash = ( ..... );
       foreach my $key1 (@keyset1) {
    ...
              print $inner->{$key2};
          }
       }
    
  2. or download this
       my %hash = ( ..... );
       foreach my $key1 (@keyset1) {
    ...
              print $hash{$key1}{$key2};
          }
       }