If there's still some code left that tries to access an uninitialized
item in 'aa' (reading or writing), this will result in a very visible
crash instead of silently seeming to work.
Testing shows that we seem to correctly initialize each item in 'aa' (no
crashes), therefore let's hope the best ;-)
Known Bugs:
Will allow multiple letters in the () due to translation/unicode issues with regexing the key.
User input will probably bug out in a different locale.
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