You are given a code:

def main_solution(x):
    return func_20(func_15('otnrlh'), func_5(x, 'hksb'))

Can you predict the output of `main_solution("khhxduh")` 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": "khhxduh"}, "ref_output": "\u00abhok\u00bbs\u00abbtk\u00bbh\u00abhnx\u00bbd\u00aburh\u00bb\u00abl\u00bb\u00abh\u00bb", "ref_code": "def main_solution(x):\n    return func_20(func_15('otnrlh'), func_5(x, 'hksb'))", "funcname": "main_solution"}
rule