You are given a code:

def main_solution(x):
    return (('cna' + 'vwt') + func_5('pvya', 'ezdp'))

Can you predict the output of `main_solution("naozprjwc")` 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": "naozprjwc"}, "ref_output": "cnavwtezdppvya", "ref_code": "def main_solution(x):\n    return (('cna' + 'vwt') + func_5('pvya', 'ezdp'))", "funcname": "main_solution"}
rule