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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.
edit - Beaten by @B1ts once again :(,,,
You can print the input - since you're in Python, that means:
You can learn more in this document:
https://docs.codewars.com/training/troubleshooting/#error-messages-and-printing-your-inputoutput
You simply log it to console.
See https://docs.codewars.com/training/troubleshooting/#print-input
There are tests for that, which language are you referreing to? If it is Python, the top solution works just fine in those cases.