You are given a code:

def main_solution(x):
    return func_20(func_1('gysm', 2), func_4('jbpb'))

Can you predict the output of `main_solution("kcrdzgv")` 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": "kcrdzgv"}, "ref_output": "gjybspmbgysm", "ref_code": "def main_solution(x):\n    return func_20(func_1('gysm', 2), func_4('jbpb'))", "funcname": "main_solution"}
rule