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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.
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Yeah, it looks like you're right. The dangers of only writing code to pass the tests, I guess.
I think this solutuin is wrong, it work incorrect when num < 6.
So if i put for example 2 toasts in toster, it will return 2(how much i put in), instead of 4(how many more shoud i put in).
It passed the test couse they all passes values that > 6.