You are given a code:

def main_solution(x):
    return func_20(func_17('erdxu'), func_15('ssndi'))

Can you predict the output of `main_solution("rlufxt")` 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": "rlufxt"}, "ref_output": "u\u00abxsd\u00bbr\u00abes\u00bb\u00abn\u00bb\u00abd\u00bb\u00abi\u00bb", "ref_code": "def main_solution(x):\n    return func_20(func_17('erdxu'), func_15('ssndi'))", "funcname": "main_solution"}
rule