You are given a code:

def main_solution(x):
    return func_20(func_15('ndtjpo'), func_20('ktarzg', x))

Can you predict the output of `main_solution("ioypj")` 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": "ioypj"}, "ref_output": "\u00abkni\u00bbt\u00aboda\u00bby\u00abrtp\u00bbz\u00abjjg\u00bb\u00abp\u00bb\u00abo\u00bb", "ref_code": "def main_solution(x):\n    return func_20(func_15('ndtjpo'), func_20('ktarzg', x))", "funcname": "main_solution"}
rule