public boolean exists(String w) {
		String word = w.toUpperCase();
		
		for (int row = 0; row < board.length; row++) {
			for (int col = 0; col < board[0].length; col++) {
				if (word.charAt(0) == board[row][col])
					if (check(word.substring(1), row, col))
						return true;
			}
		}
		
		return false;
	}