You are given a code:

def main_solution(x):
    return func_20(func_15(x), func_5('xosba', 'zz'))

Can you predict the output of `main_solution("pmdvy")` 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": "pmdvy"}, "ref_output": "\u00abzpz\u00bbx\u00aboms\u00bbb\u00abad\u00bb\u00abv\u00bb\u00aby\u00bb", "ref_code": "def main_solution(x):\n    return func_20(func_15(x), func_5('xosba', 'zz'))", "funcname": "main_solution"}
rule