You are given a code:

def main_solution(x):
    return (func_15(x) + func_23('lulst', 1))

Can you predict the output of `main_solution("sxjmzkdve")` 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": "sxjmzkdve"}, "ref_output": "\u00abs\u00bb\u00abx\u00bb\u00abj\u00bb\u00abm\u00bb\u00abz\u00bb\u00abk\u00bb\u00abd\u00bb\u00abv\u00bb\u00abe\u00bblulst1", "ref_code": "def main_solution(x):\n    return (func_15(x) + func_23('lulst', 1))", "funcname": "main_solution"}
rule