class Main{
	public static void main (String[] args) throws java.lang.Exception 	{
		java.util.Scanner i = new java.util.Scanner(System.in);
		int n = i.nextInt();
		int m = i.nextInt();
		int array1[][] = new int[n][m];
		int array2[][] = new int[n][m];
		int array_sum[][] = new int[n][m];
		for(int k = 0; k < n; k++){
        	for(int j = 0; j < m; j++){
        		array1[k][j] = i.nextInt();
    		}
		}
		for(int k = 0; k < n; k++){
        	for(int j = 0; j < m; j++){
        		array2[k][j] = i.nextInt();
    		}
		}
		for(int k = 0; k < n; k++){
        	for(int j = 0; j < m; j++){
        		array_sum[k][j] = array1[k][j] + array2[k][j];
        		System.out.print (array_sum[k][j] + " ");
    		}
    		System.out.println();
		}
	}
}