You are given a code:

def main_solution(x):
    return func_20(func_15(x), func_15('llhzzj'))

Can you predict the output of `main_solution("nahrjtnjy")` 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": "nahrjtnjy"}, "ref_output": "\u00ab\u00abnl\u00bb\u00bb\u00ab\u00abal\u00bb\u00bb\u00ab\u00abhh\u00bb\u00bb\u00ab\u00abrz\u00bb\u00bb\u00ab\u00abjz\u00bb\u00bb\u00ab\u00abtj\u00bb\u00bb\u00abn\u00bb\u00abj\u00bb\u00aby\u00bb", "ref_code": "def main_solution(x):\n    return func_20(func_15(x), func_15('llhzzj'))", "funcname": "main_solution"}
rule