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  1. or download this
    my @sorted_scores = sort { $b <=> $a } keys %HashA;
    
  2. or download this
    my @sorted_words = map { $HashA{$_} } @sorted_scores;
    
  3. or download this
    my @sorted_line_nums = map { $HashB{$_} } @sorted_words;
    
  4. or download this
    print($HashC{$_}, "\n");
       foreach @sorted_line_nums;
    
  5. or download this
    print("$_\n");
       foreach map { $HashC{$HashB{$HashA{$_}}} }
               sort { $b <=> $a }
               keys %HashA;