You are given a code:

def main_solution(x):
    return func_5(func_11('nkgi', 3), 'izv')

Can you predict the output of `main_solution("kqvykulhb")` 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": "kqvykulhb"}, "ref_output": "izvqnjl", "ref_code": "def main_solution(x):\n    return func_5(func_11('nkgi', 3), 'izv')", "funcname": "main_solution"}
rule