hello Monks again, I have the following code :

@CATEGORY = ("USA", "CANADA" , "EUROPE" , "TAIWAN");
@FOOD = ("PIZZA" , "MAPLE" , "EURO" , "INDEPENDENCE");
[download]

note that USA correspond to PIZZA and CANADA correspond to MAPLE and etc ... now i sorted the array by highest length to lowest length

@FOOD = ("INDEPENDENCE", "MAPLE", "PIZZA" , "EURO");
[download]

I have a lot of file names sorted in @FILENAMES. I want to sort this list based on longest names to shortest (@FOOD) since it's possible to subsets of search names and put them into the individual countries . Example

@FILENAMES = ("MAPLESTEA.txt" , "HOTPIZZA.txt" , "EURODOLLAR.txt");

end result i want to be is 

$HASH{"CANADA"}{"MAPLESTEA.txt"} =  1;
$HASH{"USA"}{"HOTPIZZA.txt"} = 1;
$HASH{"EUROPE"}{"EURODOLLAR.txt"} = 1;
[download]

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