You are given a code:

def main_solution(x):
    return func_17(('qwjte' + 'nutg'))

Can you predict the output of `main_solution("vemzztzvle")` 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": "vemzztzvle"}, "ref_output": "gtunetjwq", "ref_code": "def main_solution(x):\n    return func_17(('qwjte' + 'nutg'))", "funcname": "main_solution"}
rule