You are given a code:

def main_solution(x):
    return func_20(func_15('pbt'), func_5('ibyjj', 'aqlq'))

Can you predict the output of `main_solution("obdyootznx")` 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": "obdyootznx"}, "ref_output": "\u00abapq\u00bbl\u00abqbi\u00bbb\u00abytj\u00bbj", "ref_code": "def main_solution(x):\n    return func_20(func_15('pbt'), func_5('ibyjj', 'aqlq'))", "funcname": "main_solution"}
rule