Loading collection data...
Collections are a way for you to organize kata so that you can create your own training routines. Every collection you create is public and automatically sharable with other warriors. After you have added a few kata to a collection you and others can train on the kata contained within the collection.
Get started now by creating a new collection.
I think you just need the .replace(' ','') in the expression of the if statement. No need to make the computer do extra work there.
This comment is hidden because it contains spoiler information about the solution
Does that mean mine could also be wrong, using your test? please verify to help me learn more.
Care to elaborate? Which tests are wrong and why do you think they are wrong?
Backwards Read Primes are primes that when read backwards [...] are a different prime. (This rules out primes which are palindromes.)