You are given a code:

def main_solution(x):
    return func_20(func_9(x), func_15('tfffm'))

Can you predict the output of `main_solution("ucspkkqkl")` 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": "ucspkkqkl"}, "ref_output": "u\u00abcts\u00bbp\u00abkfk\u00bbq\u00abkfl\u00bbl\u00abkfq\u00bbk\u00abkmp\u00bbscu", "ref_code": "def main_solution(x):\n    return func_20(func_9(x), func_15('tfffm'))", "funcname": "main_solution"}
rule