I finally understood your problem. The problem description needs some adjustment. It is not clear that it is requesting only the global variable named 'z'. I thought it was referring to every global variable.
Longest Divisor Run
Project Euler: Problem 7, Nth prime
2 b | ~ 2 b
Without the French accent please!
Make your own Test Suite (part 2)
The other half of the Fibonacci sequence
Back to basics: throwing errors / exceptions
Computational power of Cody servers
"Percentages may not total 100 due to rounding"
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