You are given a code:

def main_solution(x):
    return func_20(func_9(x), func_15('rubzbw'))

Can you predict the output of `main_solution("lyitjw")` 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": "lyitjw"}, "ref_output": "l\u00abyri\u00bbt\u00abjuw\u00bbw\u00abjbt\u00bbi\u00abyzl\u00bb\u00abb\u00bb\u00abw\u00bb", "ref_code": "def main_solution(x):\n    return func_20(func_9(x), func_15('rubzbw'))", "funcname": "main_solution"}
rule