Could you provide an example in your problem statement? Also, as Evan says below, you should have more than one test case or it becomes a trivial matter to hard-code a particular answer.
Probably should add a couple more test cases so that silly people like me don't submit answers like this. ;)
Back to basics 9 - Indexed References
letter yes yes & letter no no
Number of digits in an integer
07 - Common functions and indexing 2
pressure to dB?
speed vs size
How to multiply?
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