You are given a code:

def main_solution(x):
    return func_20(func_15('nqyevn'), func_23(x, 3))

Can you predict the output of `main_solution("yvwbhz")` 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": "yvwbhz"}, "ref_output": "\u00abynv\u00bbw\u00abbqh\u00bbz\u00ab1y\u00bb\u00abe\u00bb\u00abv\u00bb\u00abn\u00bb", "ref_code": "def main_solution(x):\n    return func_20(func_15('nqyevn'), func_23(x, 3))", "funcname": "main_solution"}
rule