You are given a code:

def main_solution(x):
    return func_20(func_15(x), (x + 'kboo'))

Can you predict the output of `main_solution("shwonmn")` 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": "shwonmn"}, "ref_output": "\u00abssh\u00bbw\u00abohn\u00bbm\u00abnwk\u00bbb\u00abooo\u00bb\u00abn\u00bb\u00abm\u00bb\u00abn\u00bb", "ref_code": "def main_solution(x):\n    return func_20(func_15(x), (x + 'kboo'))", "funcname": "main_solution"}
rule