Hi, I need a regex for masking numbers ie if i am give 4512872356698 i should display 451287XXX6698 . I am able to mask all numbers except the last four by 

s/\d/X/ for (1 .. ($Number =~ tr/0-9//) - 4);

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but i need to simultaneously show the first 6 digits as well as last 4 digits while masking rest . Help..

In reply to regular expression by Anonymous Monk

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