You are given a code:

def main_solution(x):
    return func_5('krs', 'bvfd')

Can you predict the output of `main_solution("pfzzdzd")` 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": "pfzzdzd"}, "ref_output": "bvfdkrs", "ref_code": "def main_solution(x):\n    return func_5('krs', 'bvfd')", "funcname": "main_solution"}
rule