You are given a code:

def main_solution(x):
    return func_20(func_15(x), func_9('dfrjbz'))

Can you predict the output of `main_solution("yjqda")` 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": "yjqda"}, "ref_output": "\u00abdyf\u00bbr\u00abjjb\u00bbz\u00abzqb\u00bbj\u00abrdf\u00bbd\u00aba\u00bb", "ref_code": "def main_solution(x):\n    return func_20(func_15(x), func_9('dfrjbz'))", "funcname": "main_solution"}
rule