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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.
Nice solution ;)
Perhaps you've misunterstood the details. In order to perform 7 handshakes you do need at least 5 people. If everyone handshaked, then 5 people would produce a total of 10 handshakes, while 4 people would produce 6 handshakes (not enough).
if handshakes are 7 must return 10 and not 5