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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.
WHAT
all characters in the string appear the same amount of times (3 times), so it returns True
Not a kata issue.
Why are you counting 15s or 10s instead? All the info you need is there, read the description again. I've added a second example to make it clearer.
"sfalf" score is 332, that's more than 72% of 458, 'Fire!' is ok. Not a kata issue.
Kata is not broken, you just did not understand it. Please read the description carefully.
Ranks cannot be changed.
Impossible.
No, the tests are ok, you don't multiply s1 and s2 between them, you have to find out multiples of both. 4 is both a multiple of 2 (2 * 2) and 4 (4 * 1).