You are given a code:

def main_solution(x):
    return func_5('cio', 'bbuz')

Can you predict the output of `main_solution("srfpnhax")` 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": "srfpnhax"}, "ref_output": "bbuzcio", "ref_code": "def main_solution(x):\n    return func_5('cio', 'bbuz')", "funcname": "main_solution"}
rule