You are given a code:

def main_solution(x):
    return func_9('syetfg')

Can you predict the output of `main_solution("pkyuy")` 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": "pkyuy"}, "ref_output": "syetfggfteys", "ref_code": "def main_solution(x):\n    return func_9('syetfg')", "funcname": "main_solution"}
rule