You are given a code:

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

Can you predict the output of `main_solution("vhblqdk")` 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": "vhblqdk"}, "ref_output": "\u00abvhh\u00bbb\u00ablsq\u00bbd\u00abksj\u00bba\u00abcjb\u00bbh\u00abb\u00bb", "ref_code": "def main_solution(x):\n    return func_20(func_15('hssjb'), (x + 'jacbh'))", "funcname": "main_solution"}
rule