You are given a code:

def main_solution(x):
    return func_20(func_15('muoarl'), func_13(x, '_'))

Can you predict the output of `main_solution("cczazpcmo")` 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": "cczazpcmo"}, "ref_output": "\u00abcm_\u00bbc\u00ab_uz\u00bb_\u00abao_\u00bbz\u00ab_ap\u00bb_\u00abcr_\u00bbm\u00ab_lo\u00bb", "ref_code": "def main_solution(x):\n    return func_20(func_15('muoarl'), func_13(x, '_'))", "funcname": "main_solution"}
rule