You are given a code:

def main_solution(x):
    return func_20('vgwerl', 'klnsgs')

Can you predict the output of `main_solution("fogkd")` 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": "fogkd"}, "ref_output": "vkglwnesrgls", "ref_code": "def main_solution(x):\n    return func_20('vgwerl', 'klnsgs')", "funcname": "main_solution"}
rule