An example of how the Strings may look:
TADE000177
TADE007,daFG
TADE0277 DFDFG
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Exactly four characters followed by 1 or more digits:
[A-Z]{4}\d+Remember to escape the backslash if you put it in a string literal.
Breakdown:
[A-Z]…: An upper case letter, equivalent to\p{Upper}[A-Za-z]or\p{Alpha}…{4}…exactly 4 times…\d…+a digit…+1 or more times*.