How to understand regular expression with python?

by 
^([a-zA-Z]+)\s+[a-zA-Z]+\s+([\w]+(?=\d$)\d)

Dont really know the basis for this selection but still you can get it like this.Just grab the captures.Dont forget to set the flags g and m.See demo.

http://regex101.com/r/nA6hN9/38

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