You are given a code:

def main_solution(x):
    return func_20(func_15('gmuw'), func_5('ovu', 'drgo'))

Can you predict the output of `main_solution("hsm")` 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": "hsm"}, "ref_output": "\u00abdgr\u00bbg\u00abomo\u00bbv\u00abuu\u00bb\u00abw\u00bb", "ref_code": "def main_solution(x):\n    return func_20(func_15('gmuw'), func_5('ovu', 'drgo'))", "funcname": "main_solution"}
rule