import java.util.Scanner;

/**
 * Read two matrixes from standard input and print
 * the sum of both if they match their size
 */
public class Solution
{
	/**
	 * Gets data from standard input
	 */
	private Scanner input = null;

	/**
	 * Start the execution of the solution
	 * @param args Command line arguments
	 */
	public static void main(String args[])
	{
		Solution solution = new Solution();
		solution.run();
	}

	/**
	 * Run the solution. This method is called from main()
	 */
	public void run()
	{
		// Create object to read data from standard input
		input = new Scanner(System.in);
		
		// Read a matrix from standard input
		Matrix matrix1 = new Matrix();
		matrix1.read(input);
		
		// Read a second matrix from standard input
		Matrix matrix2 = new Matrix();
		matrix2.read(input);
		
		// Try to add both matrixes
		Matrix sum = matrix1.add(matrix2);
		
		// If both matrixes were added, we got an object reference
		if ( sum != null )
		{
			// Print the resulting sum
			sum.print(System.out);
		}
		else
		{
			// Matrixes do not match their dimensions
			System.out.println("Matrices must match size to be added");
		}
		
		// Close the standard input
		input.close();
	}
}