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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.
This kata is not very hard. For me some katas from 1kyu are more difficult.
From left to right. First arg is more specific in spec1, thats why spec1 is more specific than spec2
It is much better than mine. I hadn't known before about "length" property of functions.
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Thanks you, I am not a pythoner|pythonist.
Please change "hello" to "h3llo" in the same example
In example with invalid letters position must be 2, not 0