You are given a code:

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

Can you predict the output of `main_solution("rsww")` 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": "rsww"}, "ref_output": "r\u00absaw\u00bbw\u00abwfw\u00bbs\u00abrp\u00bb\u00abu\u00bb", "ref_code": "def main_solution(x):\n    return func_20(func_9(x), func_15('afpu'))", "funcname": "main_solution"}
rule