Sorting a hash by value, and displaying the key

[David Michael]

Hello,
    I have a hash that needs to be displayed in a certain order. I tried
    
    foreach $key (sort (keys %HASH)) {
        print $key;
    }

    that sorts alphabetically. I need it in the order it was inserted, so I made the 
value a number that increased for each key. I need to sort by the value, but display 
the key. Any ideas ?