You are given a code:

def main_solution(x):
    return (func_5('zbuzrj', 'qn') + func_5(x, 'kv'))

Can you predict the output of `main_solution("qktzqx")` 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": "qktzqx"}, "ref_output": "qnzbuzrjkvqktzqx", "ref_code": "def main_solution(x):\n    return (func_5('zbuzrj', 'qn') + func_5(x, 'kv'))", "funcname": "main_solution"}
rule