I can I solve this problem

Question

I trying to solve the new driver's license code coach, but when I try to convert the string to string array it's not working.
https://code.sololearn.com/cR6pmKHfaXyr/?ref=app

Answer 1

https://code.sololearn.com/cmk50KoZc5P7/?ref=app

Please check this guide.
I hope it will help you..