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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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} else if (finalWords.contains("7")) {
arrOfWords[6] = finalWords;
}
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Above is the wrong part. I guess you can easily fix it by yourself :)
over 6K solvers in Java indicate the tests are just fine, anyway, when your code doesn't work, it's not a kata issue. you could ask a question, lable it as such. if you post code, use the spoiler tag and proper code markdown