You are given a code:

def main_solution(x):
    return func_20(func_15('bqk'), func_20(x, 'hchk'))

Can you predict the output of `main_solution("ryukhu")` 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": "ryukhu"}, "ref_output": "\u00abrbh\u00bby\u00abcqu\u00bbh\u00abkkk\u00bbhu", "ref_code": "def main_solution(x):\n    return func_20(func_15('bqk'), func_20(x, 'hchk'))", "funcname": "main_solution"}
rule