You are given a code:

def main_solution(x):
    return (('pcxyuf' + 'tetx') + (x + 'qlu'))

Can you predict the output of `main_solution("rwrehzpg")` without writing any code? Please reason and put your final answer in the following json format: {"output": <your output>}, where <your output> should be the final string.
user
{"ref_input": {"x": "rwrehzpg"}, "ref_output": "pcxyuftetxrwrehzpgqlu", "ref_code": "def main_solution(x):\n    return (('pcxyuf' + 'tetx') + (x + 'qlu'))", "funcname": "main_solution"}
rule