You are given a code:

def main_solution(x):
    return func_20(func_15('yoez'), ('ehk' + 'gitkij'))

Can you predict the output of `main_solution("ybhkpxsx")` 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": "ybhkpxsx"}, "ref_output": "\u00abeyh\u00bbk\u00abgoi\u00bbt\u00abkei\u00bbj\u00abz\u00bb", "ref_code": "def main_solution(x):\n    return func_20(func_15('yoez'), ('ehk' + 'gitkij'))", "funcname": "main_solution"}
rule