The test suite should check the size of the answer. It seems kind of a cheat to give an answer with 8 characters when the encrypted message has length 10. We can't be sure if the person found the asnwer for the two last characters or not.
And this problem is much easier than others you solved here!! ;-)
Sorry, I was tempted by the 'break the lock' part... :)
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Is my wife right?
Project Euler: Problem 10, Sum of Primes
Back to basics 20 - singleton dimensions
Strange Number Algorithms
Optimum Egyptian Fractions
How many solutions has this problem?
expand intervals vol.3
Pernicious Anniversary Problem
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