1multi-select and grouping problems, please help!

1multi-select and grouping problems, please help!

I have a multi-select column that I need to analyze by groups; so I have two problems, when I import it into Reports I get an error due ton 100 character limit.  I could try and change the data to  (1, 2,3, instead of text) with a script but I do not know how to write the script.

Please help