You are given a code:

def main_solution(x):
    return (func_15('vkezyq') + func_11('dknimq', 5))

Can you predict the output of `main_solution("esj")` 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": "esj"}, "ref_output": "\u00abv\u00bb\u00abk\u00bb\u00abe\u00bb\u00abz\u00bb\u00aby\u00bb\u00abq\u00bbipsnrv", "ref_code": "def main_solution(x):\n    return (func_15('vkezyq') + func_11('dknimq', 5))", "funcname": "main_solution"}
rule