# Regex to Replace and Transform

**URL:** <https://forum.kirupa.com/t/regex-to-replace-and-transform/288187>\
**Category:** flash\
**Created:** [May 12, 2009, 5:07pm UTC](https://forum.kirupa.com/t/regex-to-replace-and-transform/288187 "2009-05-12T17:07:20Z")\
**Posts on this page:** 1\
**Page:** 1

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**Author:** ![zik80](https://avatars.discourse-cdn.com/v4/letter/z/c37758/32.png) [@zik80](https://forum.kirupa.com/u/zik80)\
**Post date:** [May 12, 2009, 5:07pm UTC](https://forum.kirupa.com/t/regex-to-replace-and-transform/288187/1 "2009-05-12T17:07:20Z")

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Please, what is the best Regular Expression code to transform StringA to StringB?  
StringA: III Class (1, 7, 9 and 4). IV Class 6, 8, 3. I Class 2-8  
StringB: 3rd Class 1,7,9,4;4th Class 6,8,3;1st Class 2-8  
:cowboy: