You are given a code:

def main_solution(x):
    return (func_15('gvky') + func_9('jayjry'))

Can you predict the output of `main_solution("xav")` 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": "xav"}, "ref_output": "\u00abg\u00bb\u00abv\u00bb\u00abk\u00bb\u00aby\u00bbjayjryyrjyaj", "ref_code": "def main_solution(x):\n    return (func_15('gvky') + func_9('jayjry'))", "funcname": "main_solution"}
rule