You are given a code:

def main_solution(x):
    return func_20('onfyyf', 'anvhz')

Can you predict the output of `main_solution("ucrrjappyg")` 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": "ucrrjappyg"}, "ref_output": "oannfvyhyzf", "ref_code": "def main_solution(x):\n    return func_20('onfyyf', 'anvhz')", "funcname": "main_solution"}
rule