You are given a code:

def main_solution(x):
    return (func_5('dvx', 'qbyj') + func_9('lobdf'))

Can you predict the output of `main_solution("phmcrdu")` 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": "phmcrdu"}, "ref_output": "qbyjdvxlobdffdbol", "ref_code": "def main_solution(x):\n    return (func_5('dvx', 'qbyj') + func_9('lobdf'))", "funcname": "main_solution"}
rule