Hi Ankeraout, here is the difference between validator 15 (renumbered 14 now) and its testcase:
Validator 14
It’s the same as its testcase, one of the variables don’t exist. The only difference here is that an unequality operator is being used and instead of doing $y != $z it’s doing y != $z.
And for test 8: the z add $x actually doesn’t get executed because print stops the program execution, meaning all lines after it won’t get executed.
Thanks for the rest of the feedback