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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.
@qiuhan: test added in "SUBMIT". Good catch, thanks!
I don't do Go (so I can't see that solution), but maybe @g964 could take a look?
Read the instructions again, that is obviously false, all rotations of
"abc"
are:"abc", "bca", "cab"
.