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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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if your code failed in a few tests(not server issue like timeout):
u should focus on that num of each letter in second string(str2) which must be less than or equal to the same letter in (str1) like this:
(javscript,javascript) str1 should be =javascript not javscript
lol on your way we will suppose that:
'NORTH','SOUTH' may represent:say,going 10 miles north to the next junction,2miles south
it's incorrect compiler