You are given a code:

def main_solution(x):
    return (func_15('asihl') + func_19('gkvqzz', 3))

Can you predict the output of `main_solution("ofbuq")` 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": "ofbuq"}, "ref_output": "\u00aba\u00bb\u00abs\u00bb\u00abi\u00bb\u00abh\u00bb\u00abl\u00bbqzzgkv", "ref_code": "def main_solution(x):\n    return (func_15('asihl') + func_19('gkvqzz', 3))", "funcname": "main_solution"}
rule