You are given a code:

def main_solution(x):
    return func_20(func_15('hztlze'), func_4(x))

Can you predict the output of `main_solution("sgxbgx")` 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": "sgxbgx"}, "ref_output": "\u00abshg\u00bbx\u00abbzg\u00bbx\u00abt\u00bb\u00abl\u00bb\u00abz\u00bb\u00abe\u00bb", "ref_code": "def main_solution(x):\n    return func_20(func_15('hztlze'), func_4(x))", "funcname": "main_solution"}
rule