You are given a code:

def main_solution(x):
    return func_20('xuz', 'ijh')

Can you predict the output of `main_solution("gpn")` 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": "gpn"}, "ref_output": "xiujzh", "ref_code": "def main_solution(x):\n    return func_20('xuz', 'ijh')", "funcname": "main_solution"}
rule