You are given a code:

def main_solution(x):
    return func_20(func_15('sll'), func_20(x, 'lzbns'))

Can you predict the output of `main_solution("jbkh")` 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": "jbkh"}, "ref_output": "\u00abjsl\u00bbb\u00abzlk\u00bbb\u00abhln\u00bbs", "ref_code": "def main_solution(x):\n    return func_20(func_15('sll'), func_20(x, 'lzbns'))", "funcname": "main_solution"}
rule