You are given a code:

def main_solution(x):
    return func_20(func_3(x), func_15('ncen'))

Can you predict the output of `main_solution("dpqbzcjmq")` 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": "dpqbzcjmq"}, "ref_output": "b\u00abcnd\u00bbj\u00abmcp\u00bbq\u00abqez\u00bb\u00abn\u00bb", "ref_code": "def main_solution(x):\n    return func_20(func_3(x), func_15('ncen'))", "funcname": "main_solution"}
rule