You are given a code:

def main_solution(x):
    return func_20(func_15('necbx'), func_20(x, x))

Can you predict the output of `main_solution("nzsebdfoza")` 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": "nzsebdfoza"}, "ref_output": "\u00abnnn\u00bbz\u00abzes\u00bbs\u00abece\u00bbb\u00abbbd\u00bbd\u00abfxf\u00bboozzaa", "ref_code": "def main_solution(x):\n    return func_20(func_15('necbx'), func_20(x, x))", "funcname": "main_solution"}
rule