You are given a code:

def main_solution(x):
    return func_20(func_20('qrjx', x), func_15('dqlqku'))

Can you predict the output of `main_solution("fjswdexfi")` 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": "fjswdexfi"}, "ref_output": "q\u00abfdr\u00bbj\u00abjqs\u00bbx\u00abwld\u00bbe\u00abxqf\u00bbi\u00abk\u00bb\u00abu\u00bb", "ref_code": "def main_solution(x):\n    return func_20(func_20('qrjx', x), func_15('dqlqku'))", "funcname": "main_solution"}
rule