You are given a code:

def main_solution(x):
    return func_20(func_20('jeod', x), func_15('nbzgcg'))

Can you predict the output of `main_solution("dnng")` 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": "dnng"}, "ref_output": "j\u00abdne\u00bbn\u00abobn\u00bbd\u00abgz\u00bb\u00abg\u00bb\u00abc\u00bb\u00abg\u00bb", "ref_code": "def main_solution(x):\n    return func_20(func_20('jeod', x), func_15('nbzgcg'))", "funcname": "main_solution"}
rule