You are given a code:

def main_solution(x):
    return func_5('pgwbyt', 'fgdq')

Can you predict the output of `main_solution("mmpq")` 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": "mmpq"}, "ref_output": "fgdqpgwbyt", "ref_code": "def main_solution(x):\n    return func_5('pgwbyt', 'fgdq')", "funcname": "main_solution"}
rule