You are given a code:

def main_solution(x):
    return func_20(func_15(x), func_20('aeim', 'wwqxr'))

Can you predict the output of `main_solution("txl")` 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": "txl"}, "ref_output": "\u00abatw\u00bbe\u00abwxi\u00bbq\u00abmlx\u00bbr", "ref_code": "def main_solution(x):\n    return func_20(func_15(x), func_20('aeim', 'wwqxr'))", "funcname": "main_solution"}
rule