You are given a code:

def main_solution(x):
    return (func_15('kjj') + func_22('ujtt'))

Can you predict the output of `main_solution("vfpqg")` 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": "vfpqg"}, "ref_output": "\u00abk\u00bb\u00abj\u00bb\u00abj\u00bbujtt", "ref_code": "def main_solution(x):\n    return (func_15('kjj') + func_22('ujtt'))", "funcname": "main_solution"}
rule