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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.
Bad solution. Tests seems to let it pass.
It may pass the test with "ABab: EeFfGgHh, LMNOPQlmnop!" which make more than 25 distinct chars, but still not an pangram.
Sorry, not clever, despite the vote for.