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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.
Had the same issue... And 'y' is both a vowel AND a consonant depending on context. So, logically, should be included. Or at least, the vowel list should appear in the description.
I had the same issue in the c# version just now.
Had to remove Y as a vowel in my check to pass.
"y" and "w" are definitely consonants in English, even if they're vowels in some other languages.
Probably one test in at least ruby version is wrong, since it expects vowel? on "Y" to return false, but
"There are six vowel letters in the English alphabet: a, e, i, o, u, y." - first google result.