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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.
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Can someone explain how this output is the correct answer:
Input: WEAREDISCOVEREDFLEEATONCE
with n=2
the expected output is WADCEFACTLROIREESVEEOENED
but even working it out manually I find the answer to be WAEICVRDLETNEERDSOEEFEAOC (as take every other letter and put on one other rail)?
eg