How large is your program? If it's not too big, it's entirely possible that updating your script to use strict could be done with minimal effort, and would give you an added level of built-in error checking that can prevent things like mislabeled variables, etc.

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DamnDirtyApe

Those who know that they are profound strive for clarity. Those who
would like to seem profound to the crowd strive for obscurity.
            --Friedrich Nietzsche