You are given a code:

def main_solution(x):
    return (func_5(x, 'oxdo') + func_9('gfynwz'))

Can you predict the output of `main_solution("fzzb")` 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": "fzzb"}, "ref_output": "oxdofzzbgfynwzzwnyfg", "ref_code": "def main_solution(x):\n    return (func_5(x, 'oxdo') + func_9('gfynwz'))", "funcname": "main_solution"}
rule