You are given a code:

def main_solution(x):
    return func_9(func_22('csddc'))

Can you predict the output of `main_solution("rcrfqtb")` 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": "rcrfqtb"}, "ref_output": "csddddsc", "ref_code": "def main_solution(x):\n    return func_9(func_22('csddc'))", "funcname": "main_solution"}
rule