You are given a code:

def main_solution(x):
    return func_20(func_20('mez', x), func_15('qhpxbc'))

Can you predict the output of `main_solution("lpokrvalw")` 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": "lpokrvalw"}, "ref_output": "m\u00ablqe\u00bbp\u00abzho\u00bbk\u00abrpv\u00bba\u00ablxw\u00bb\u00abb\u00bb\u00abc\u00bb", "ref_code": "def main_solution(x):\n    return func_20(func_20('mez', x), func_15('qhpxbc'))", "funcname": "main_solution"}
rule