def find_neighbor(x, y):
	"""
	:param x: (int) X coordinates of cur_letter
	:param y: (int) Y coordinates of cur_letter
	:return: (lst) Coordinates(Tuple) of all neighbor letters
	"""
	neighbor_lst = []
	for i in range(-1, 2):
		for j in range(-1, 2):
			if 0 <= x + i < 4:
				if 0 <= y + j < 4:
					if not i == j == 0:  # Not itself
						neighbor_lst.append((x + i, y + j))
	return neighbor_lst