You are given a code:

def main_solution(x):
    return func_20(func_20('zuygey', x), func_15('xcysas'))

Can you predict the output of `main_solution("ylcbtwxsx")` 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": "ylcbtwxsx"}, "ref_output": "z\u00abyxu\u00bbl\u00abycc\u00bbg\u00abbye\u00bbt\u00abysw\u00bbx\u00absax\u00bb\u00abs\u00bb", "ref_code": "def main_solution(x):\n    return func_20(func_20('zuygey', x), func_15('xcysas'))", "funcname": "main_solution"}
rule