You are given a code:

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

Can you predict the output of `main_solution("hqcudgr")` 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": "hqcudgr"}, "ref_output": "\u00abhhq\u00bbc\u00abuqd\u00bbg\u00abrcd\u00bbf\u00abou\u00bb\u00abd\u00bb\u00abg\u00bb\u00abr\u00bb", "ref_code": "def main_solution(x):\n    return func_20(func_15(x), (x + 'dfo'))", "funcname": "main_solution"}
rule