You are given a code:

def main_solution(x):
    return func_20(func_15('ehkp'), func_9('heizz'))

Can you predict the output of `main_solution("mlewiey")` 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": "mlewiey"}, "ref_output": "\u00abhee\u00bbi\u00abzhz\u00bbz\u00abzki\u00bbe\u00abhp\u00bb", "ref_code": "def main_solution(x):\n    return func_20(func_15('ehkp'), func_9('heizz'))", "funcname": "main_solution"}
rule