What is your opinion on this code? What can i improve?

Question

http://www.sololearn.com/app/sololearn/playground/cgW5mb1hTSqA/

https://code.sololearn.com/cgW5mb1hTSqA/#

This code takes take input word and converts it into a number according to the major system.

What would you change? I'm really terrible at regex. Is there an easier way to substitute / to replace those cases?
If there are repeating chars the most length of it should have the highest priority (should substitute to just one digit)

Answer 1

Dude, your logic is awesome! Practice makes it perfect anyway. The code is 100% functional (I know you know that) but not so mobile-friendly when it comes to SoloLearn app. It's not your fault though. The SoloLearn should make the user be able to write multiple inputs in the same running program.