You are given a code:

def main_solution(x):
    return func_20(func_23(x, 2), func_15('ulthng'))

Can you predict the output of `main_solution("uhmexrmv")` 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": "uhmexrmv"}, "ref_output": "u\u00abhum\u00bbe\u00abxlr\u00bbm\u00abvt1\u00bb\u00abh\u00bb\u00abn\u00bb\u00abg\u00bb", "ref_code": "def main_solution(x):\n    return func_20(func_23(x, 2), func_15('ulthng'))", "funcname": "main_solution"}
rule