You are given a code:

def main_solution(x):
    return func_20(func_20(x, 'qzhld'), func_15('ono'))

Can you predict the output of `main_solution("czovetpux")` 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": "czovetpux"}, "ref_output": "c\u00abqoz\u00bbz\u00abonh\u00bbv\u00abloe\u00bbdtpux", "ref_code": "def main_solution(x):\n    return func_20(func_20(x, 'qzhld'), func_15('ono'))", "funcname": "main_solution"}
rule