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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.
Just see more xD
Fastest solution i've seen
You absolutly right!))
Good solution! You can optimize it a little. Compare $pos with $j right after you get $pos value. If $pos < $j then you can force set ')' symbol without check (stripos($word, $letter, $pos+1)).