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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.
Under the heading "Task":
Same letters share the same digit regardless of caseJulia translation
Case sensitivity is not specified in the problem.
At least in Haskell translation the problem is case insensitive.