You are given a code:

def main_solution(x):
    return func_20(func_17(x), func_15('xjpn'))

Can you predict the output of `main_solution("bsvmchmhbu")` 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": "bsvmchmhbu"}, "ref_output": "u\u00abbxh\u00bbm\u00abhjc\u00bbm\u00abvps\u00bbb\u00abn\u00bb", "ref_code": "def main_solution(x):\n    return func_20(func_17(x), func_15('xjpn'))", "funcname": "main_solution"}
rule