You are given a code:

def main_solution(x):
    return (('hjdmlb' + x) + func_5('hfca', 'ko'))

Can you predict the output of `main_solution("jbz")` 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": "jbz"}, "ref_output": "hjdmlbjbzkohfca", "ref_code": "def main_solution(x):\n    return (('hjdmlb' + x) + func_5('hfca', 'ko'))", "funcname": "main_solution"}
rule