You are given a code:

def main_solution(x):
    return func_19(func_5('yki', 'opay'), 2)

Can you predict the output of `main_solution("knta")` 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": "knta"}, "ref_output": "ayykiop", "ref_code": "def main_solution(x):\n    return func_19(func_5('yki', 'opay'), 2)", "funcname": "main_solution"}
rule