You are given a code:

def main_solution(x):
    return func_20(func_22(x), func_15('tvdu'))

Can you predict the output of `main_solution("ueemrneytf")` 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": "ueemrneytf"}, "ref_output": "u\u00abete\u00bbm\u00abrvn\u00bbe\u00abydt\u00bbf\u00abu\u00bb", "ref_code": "def main_solution(x):\n    return func_20(func_22(x), func_15('tvdu'))", "funcname": "main_solution"}
rule