You are given a code:

def main_solution(x):
    return func_20(('gwbfz' + 'cppqwl'), func_15(x))

Can you predict the output of `main_solution("sseulfft")` 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": "sseulfft"}, "ref_output": "g\u00abwsb\u00bbf\u00abzsc\u00bbp\u00abpeq\u00bbw\u00ablu\u00bb\u00abl\u00bb\u00abf\u00bb\u00abf\u00bb\u00abt\u00bb", "ref_code": "def main_solution(x):\n    return func_20(('gwbfz' + 'cppqwl'), func_15(x))", "funcname": "main_solution"}
rule