You are given a code:

def main_solution(x):
    return func_17('demlvq')

Can you predict the output of `main_solution("ntlf")` 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": "ntlf"}, "ref_output": "qvlmed", "ref_code": "def main_solution(x):\n    return func_17('demlvq')", "funcname": "main_solution"}
rule