You are given a code:

def main_solution(x):
    return func_9(func_20('rjng', 'jyoqvc'))

Can you predict the output of `main_solution("piloxmkb")` 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": "piloxmkb"}, "ref_output": "rjjynogqvccvqgonyjjr", "ref_code": "def main_solution(x):\n    return func_9(func_20('rjng', 'jyoqvc'))", "funcname": "main_solution"}
rule