You are given a code:

def main_solution(x):
    return func_20(func_15(x), func_20('udocnu', 'fzcnsu'))

Can you predict the output of `main_solution("zwpmq")` 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": "zwpmq"}, "ref_output": "\u00abuzf\u00bbd\u00abzwo\u00bbc\u00abcpn\u00bbn\u00absmu\u00bbu\u00abq\u00bb", "ref_code": "def main_solution(x):\n    return func_20(func_15(x), func_20('udocnu', 'fzcnsu'))", "funcname": "main_solution"}
rule