How to delete every 2nd character in a string?
For example:
3030313535333635 -> 00155365
3030303336313435 -> 00036145
3032323437353530 -> 02247550
The strings are always 16-characters long and the result is always 8 characters long - and the character that is being removed is always a '3' - Don't ask why however - I did not dream up this crazy source data.
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