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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.
there are several flavors of base64 and in this kata padding is not required for either encoding or decoding. the description says :
It is not required for this algorithm, it says so in the footnote
"Note: This kata uses the non-padding version ("=" is not added to the end)."