You are given a code:

def main_solution(x):
    return func_20(func_15('dci'), func_20('rhackg', 'ytpa'))

Can you predict the output of `main_solution("wjdvhhjjj")` 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": "wjdvhhjjj"}, "ref_output": "\u00abrdy\u00bbh\u00abtca\u00bbp\u00abcia\u00bbkg", "ref_code": "def main_solution(x):\n    return func_20(func_15('dci'), func_20('rhackg', 'ytpa'))", "funcname": "main_solution"}
rule