from collections import namedtuple
from itertools import product

Cell = namedtuple('Cell', ['x', 'y'], verbose=True)

def get_neighbors(coordinate):
    row = ord(coordinate[0])
    col = int(coordinate[1:])

    coordinates = [Cell(x, y) for x, y in product(range(-1, 2), range(-1, 2))]

    coordinates = [cell for cell in coordinates if cell != Cell(0, 0)]

    coordinates = [Cell(row + cell.x, col + cell.y) for cell in coordinates]

    coordinates = [cell for cell in coordinates if ord('A') <= cell.x <= ord('Y')]
    coordinates = [cell for cell in coordinates if 0 <= cell.y <= 24]

    return [f"{chr(cell.x)}{cell.y}" for cell in coordinates]