You are given a code:

def main_solution(x):
    return (func_15('rtylf') + func_22('nji'))

Can you predict the output of `main_solution("gahbopmaa")` 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": "gahbopmaa"}, "ref_output": "\u00abr\u00bb\u00abt\u00bb\u00aby\u00bb\u00abl\u00bb\u00abf\u00bbnj", "ref_code": "def main_solution(x):\n    return (func_15('rtylf') + func_22('nji'))", "funcname": "main_solution"}
rule