You are given a code:

def main_solution(x):
    return func_20(func_1('obyyo', 3), func_15('cyvl'))

Can you predict the output of `main_solution("ymbxrzxyeb")` 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": "ymbxrzxyeb"}, "ref_output": "o\u00abbcy\u00bby\u00aboyo\u00bbb\u00abyvy\u00bbo\u00abolb\u00bbyyo", "ref_code": "def main_solution(x):\n    return func_20(func_1('obyyo', 3), func_15('cyvl'))", "funcname": "main_solution"}
rule