I have a spreadsheet with only one column named product catergory (UNSPSC if someone is familiar with that).
e.g. I have these 5 numbers for my 5 products:
42121510
42121510
42121510
42121511
42121509
I want to evaluate from left to right where the numbers match and end up with a result, that says 421215 which is what they have in common. I could also have 5 different categories starting with different number e.g. 42, 43, 10 or whatever.
How to do it?
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