public class Puzzle extends Object{
    private char[][] puzzleGrid;

    /**
     * Load a puzzle from a puzzle file. If any errors occur
     * during the processing of the puzzle file, the appropriate
     * exceptions will be thrown.
     *
     * @param puzzleFile  the name of the file containing the
     *                    puzzle to load
     * @throw PuzzleFileFormatException  if puzzle file is invalid
     * @throw java.io.IOException
     * @throw java.io.FileNotFoundException
     */

    public Puzzle( String puzzleFile ) throws PuzzleFileFormatException, java.io.IOException, java.io.FileNotFoundException{
       
        Scanner file = new Scanner( puzzleFile );
        puzzleGrid = new char [file.nextInt()][file.nextInt()];
        for( int i = 0; i < puzzleGrid.length; i++){
            String row = file.next();
            for( int j = 0; j < puzzleGrid[i].length; j++){
                puzzleGrid[i][j] = row.charAt(j);
            }
        }        
    }

    /**
     * Replace the puzzle currently stored in this object with
     * the puzzle contained in the given file. If any error
     * occurs during the processing of the puzzle file, the
     * puzzle will be set to null and the appropriate exception
     * will be thrown.
     *
     * @param puzzleFile  the name of the file containing the puzzle to load
     * @throw PuzzleFileFormatException  if puzzle file is invalid
     * @throw java.io.FileNotFoundException
     * @throw java.io.IOException
     */

    public void setPuzzle( String puzzleFile ) throws java.io.FileNotFoundException, java.io.IOException, PuzzleFileFormatException{
    }

    /**
     * Print the puzzle contained in this object to standard output.
     */

    public void print(){
        for( int i = 0; i < puzzleGrid.length; i++){
            System.out.println();
            for( int j = 0; j < puzzleGrid[i].length; j++){
                System.out.print(puzzleGrid[i][j]);
            }
        }
    }