You are given a code:

def main_solution(x):
    return func_20(func_1(x, 2), func_15('lyst'))

Can you predict the output of `main_solution("mzceepv")` 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": "mzceepv"}, "ref_output": "m\u00abzlc\u00bbe\u00abeyp\u00bbv\u00abmsz\u00bbc\u00abete\u00bbpv", "ref_code": "def main_solution(x):\n    return func_20(func_1(x, 2), func_15('lyst'))", "funcname": "main_solution"}
rule