You are given a code:

def main_solution(x):
    return func_20(func_15('kjju'), func_5('aeksa', 'gw'))

Can you predict the output of `main_solution("xpxj")` 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": "xpxj"}, "ref_output": "\u00abgkw\u00bba\u00abejk\u00bbs\u00abaj\u00bb\u00abu\u00bb", "ref_code": "def main_solution(x):\n    return func_20(func_15('kjju'), func_5('aeksa', 'gw'))", "funcname": "main_solution"}
rule