You are given a code:

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

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