You are given a code:

def main_solution(x):
    return (func_4('mirf') + func_9('rcbzq'))

Can you predict the output of `main_solution("smiudqi")` 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": "smiudqi"}, "ref_output": "mirfrcbzqqzbcr", "ref_code": "def main_solution(x):\n    return (func_4('mirf') + func_9('rcbzq'))", "funcname": "main_solution"}
rule