You are given a code:

def main_solution(x):
    return func_20(func_5(x, 'lftz'), func_15('xdtvcs'))

Can you predict the output of `main_solution("ufwfjq")` 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": "ufwfjq"}, "ref_output": "l\u00abfxt\u00bbz\u00abudf\u00bbw\u00abftj\u00bbq\u00abv\u00bb\u00abc\u00bb\u00abs\u00bb", "ref_code": "def main_solution(x):\n    return func_20(func_5(x, 'lftz'), func_15('xdtvcs'))", "funcname": "main_solution"}
rule