public String toString() {
        String outStr = "";
        
        for (int col = 0; col < board[0].length; col ++) {
            outStr += col + " ";
        }
        
        outStr += "\n";
        
        for (int row = 0; row < board.length; row ++) {
            for (int col = 0; col < board[row].length; col ++) {
                outStr += board[row][col] + " ";
            }
            
            outStr += "\n";
        }
        
        return outStr;
	}