currently, the kata mentions:

Optimize the given Brainfuck code.

That's what I thought. But there are actual optimization steps you'd have to take.

Is this normal?

Fatal error: Allowed memory size of 134217728 bytes exhausted (tried to allocate 67108872 bytes) in /home/codewarrior/run.php on line 24

Do I need to optimize my code or something like that? The instruction does not contain any requirements about it. I think one of the tests (all passes) tries to translate very big string.

Thanks in advance.

Very clever