You are given a code:

def main_solution(x):
    return func_20(('saeub' + x), func_15('aslzu'))

Can you predict the output of `main_solution("dnyda")` 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": "dnyda"}, "ref_output": "s\u00abaae\u00bbu\u00abbsd\u00bbn\u00abyld\u00bba\u00abz\u00bb\u00abu\u00bb", "ref_code": "def main_solution(x):\n    return func_20(('saeub' + x), func_15('aslzu'))", "funcname": "main_solution"}
rule