getting NZEC error in java

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I am getting NZEC error in the following code for “forgot password question” july challenge, not able to identify the error, any help would be appreciated.

PLEASE DO NOT POST CODE OR LOGIC OR ALGORITHMS RELATED TO ONGOING CONTESTS. THIS IS A LIVE CONTEST AND YOU ARE MEANT TO SOLVE IT ON YOUR OWN. IT WOULD NOT HAVE BEEN CALLED A “CONTEST” IF QUESTIONS WERE TO BE SOLVED BY PUBLIC DISCUSSION.

We will be more than happy to help you once the contest is over. Till then keep trying

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