You are given a code:

def main_solution(x):
    return func_20(('swxdz' + 'vmu'), func_23('kpt', 2))

Can you predict the output of `main_solution("kxcwxvfmpf")` 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": "kxcwxvfmpf"}, "ref_output": "skwpxtd1zvmu", "ref_code": "def main_solution(x):\n    return func_20(('swxdz' + 'vmu'), func_23('kpt', 2))", "funcname": "main_solution"}
rule