You are given a code:

def main_solution(x):
    return func_20(func_15(x), func_20('hou', x))

Can you predict the output of `main_solution("vqzuvkozk")` 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": "vqzuvkozk"}, "ref_output": "\u00abhvv\u00bbo\u00abqqu\u00bbz\u00abuzv\u00bbk\u00abouz\u00bbk\u00abv\u00bb\u00abk\u00bb\u00abo\u00bb\u00abz\u00bb\u00abk\u00bb", "ref_code": "def main_solution(x):\n    return func_20(func_15(x), func_20('hou', x))", "funcname": "main_solution"}
rule