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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.
It's not actually a great solution because it requires a big dependency and uses floating point.
This is poorly specified. You can't tell exactly what it wants you to do for many types of strings without trying to run it.
In python, if you have a global variable named 'chars' it will get set to 'abcdefghijklmnopqrstuvwxyz ABCDEFGHIJKLMNOPQRSTUVWXYZ0123456789+/' right before the random tests start (but after the basic tests run.) This was insanely frustrating as I had a variable with this name and similar (but not identical) contents and it took me a very long time to figure out what was going on.