You are given a code:

def main_solution(x):
    return func_9(func_15('rfe'))

Can you predict the output of `main_solution("pvemxruqyi")` 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": "pvemxruqyi"}, "ref_output": "\u00abr\u00bb\u00abf\u00bb\u00abe\u00bb\u00bbe\u00ab\u00bbf\u00ab\u00bbr\u00ab", "ref_code": "def main_solution(x):\n    return func_9(func_15('rfe'))", "funcname": "main_solution"}
rule