You are given a code:

def main_solution(x):
    return (func_17('mvop') + func_22('vohq'))

Can you predict the output of `main_solution("nfoujgfk")` 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": "nfoujgfk"}, "ref_output": "povmvohq", "ref_code": "def main_solution(x):\n    return (func_17('mvop') + func_22('vohq'))", "funcname": "main_solution"}
rule