You are given a code:

def main_solution(x):
    return func_20(func_9(x), func_15('zccedz'))

Can you predict the output of `main_solution("ubmpmij")` 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": "ubmpmij"}, "ref_output": "u\u00abbzm\u00bbp\u00abmci\u00bbj\u00abjci\u00bbm\u00abpem\u00bbb\u00abud\u00bb\u00abz\u00bb", "ref_code": "def main_solution(x):\n    return func_20(func_9(x), func_15('zccedz'))", "funcname": "main_solution"}
rule