You are given a code:

def main_solution(x):
    return func_20(func_20(x, 'tcfk'), func_15('danbpl'))

Can you predict the output of `main_solution("ufqsds")` 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": "ufqsds"}, "ref_output": "u\u00abtdf\u00bbc\u00abqaf\u00bbs\u00abknd\u00bbs\u00abb\u00bb\u00abp\u00bb\u00abl\u00bb", "ref_code": "def main_solution(x):\n    return func_20(func_20(x, 'tcfk'), func_15('danbpl'))", "funcname": "main_solution"}
rule