You are given a code:

def main_solution(x):
    return func_20(func_15('qzten'), func_20('jqcwji', 'rjkby'))

Can you predict the output of `main_solution("nryppcwkep")` 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": "nryppcwkep"}, "ref_output": "\u00abjqr\u00bbq\u00abjzc\u00bbk\u00abwtb\u00bbj\u00abyei\u00bb\u00abn\u00bb", "ref_code": "def main_solution(x):\n    return func_20(func_15('qzten'), func_20('jqcwji', 'rjkby'))", "funcname": "main_solution"}
rule