You are given a code:

def main_solution(x):
    return func_20(('bnjgmp' + 'xuguhd'), func_15('kjbe'))

Can you predict the output of `main_solution("vulyvamoy")` 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": "vulyvamoy"}, "ref_output": "b\u00abnkj\u00bbg\u00abmjp\u00bbx\u00abubg\u00bbu\u00abhed\u00bb", "ref_code": "def main_solution(x):\n    return func_20(('bnjgmp' + 'xuguhd'), func_15('kjbe'))", "funcname": "main_solution"}
rule