You are given a code:

def main_solution(x):
    return func_20(func_11('jsrdqn', 4), func_15('fomwqd'))

Can you predict the output of `main_solution("zfmo")` 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": "zfmo"}, "ref_output": "n\u00abwfv\u00bbh\u00abuor\u00bb\u00abm\u00bb\u00abw\u00bb\u00abq\u00bb\u00abd\u00bb", "ref_code": "def main_solution(x):\n    return func_20(func_11('jsrdqn', 4), func_15('fomwqd'))", "funcname": "main_solution"}
rule