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your issue is
"$any_key" = "x|X"

it is taking your key say example you pressed x and comparing with "x|X" :)...you need to use use || to compare two values with if.

if [ ${any_key} = "x" ] ||...

Neither "X|x" nor just X|x are valid syntax for using with test ( [...] ) command. For this there is the "case" statement. Use
if [ "$any_key" = x ] || [ "$any_key" = X ]