You are given a code:

def main_solution(x):
    return func_20(func_15(x), func_20(x, 'mirzfp'))

Can you predict the output of `main_solution("daffoualb")` 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": "daffoualb"}, "ref_output": "\u00abddm\u00bba\u00abiaf\u00bbr\u00abffz\u00bbo\u00abffu\u00bbp\u00abaol\u00bbb\u00abu\u00bb\u00aba\u00bb\u00abl\u00bb\u00abb\u00bb", "ref_code": "def main_solution(x):\n    return func_20(func_15(x), func_20(x, 'mirzfp'))", "funcname": "main_solution"}
rule