You are given a code:

def main_solution(x):
    return func_22(func_5('nrsqb', 'fqm'))

Can you predict the output of `main_solution("ffbkdqw")` 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": "ffbkdqw"}, "ref_output": "fqmnrsqb", "ref_code": "def main_solution(x):\n    return func_22(func_5('nrsqb', 'fqm'))", "funcname": "main_solution"}
rule