A bit simpler:

$city = join '', map { (a..z,A..z)[int rand 52] } (1..10+int rand 30);
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Dr. Michael K. Neylon - mneylon-pm@masemware.com || "You've left the lens cap of your mind on again, Pinky" - The Brain
It's not what you know, but knowing how to find it if you don't know that's important