You are given a code:

def main_solution(x):
    return func_22('ndq')

Can you predict the output of `main_solution("fokflh")` 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": "fokflh"}, "ref_output": "nd", "ref_code": "def main_solution(x):\n    return func_22('ndq')", "funcname": "main_solution"}
rule