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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.
No, your code has some problems, and you can see it fails with some of the sample tests too. For instance
"0000"
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Getting error on char[] declaration. ./src/main/java/Maskify.java:6: error: unreachable statement
char[] input= new char[str.length()];
Works fine in elcipse. Any thoughts?