import java.util.Scanner;
public class MatrixAddition {
    public static void main(String[] args) {
        Scanner sc = new Scanner(System.in);

        int m = sc.nextInt();
        int n = sc.nextInt();
        if (m < 1 || n < 1 || m > 100 || n > 100) {
            System.out.println("Invalid input");
            return;
        }
        int[][] matrix1 = new int[m][n];
        int[][] matrix2 = new int[m][n];
        for (int i = 0; i < m; i++) {
            for (int j = 0; j < n; j++) {
                int val = sc.nextInt();
                if (val < 0) {
                    System.out.println("Invalid input");
                    return;
                }
                matrix1[i][j] = val;
            }
        }
        for (int i = 0; i < m; i++) {
            for (int j = 0; j < n; j++) {
                if (!sc.hasNextInt()) {
                    System.out.println("Invalid input");
                    return;
                }
                int val = sc.nextInt();
                if (val < 0) {
                    System.out.println("Invalid input");
                    return;
                }
                matrix2[i][j] = val;
            }
        }
        for (int i = 0; i < m; i++) {
            for (int j = 0; j < n; j++) {
                System.out.print(matrix1[i][j] + matrix2[i][j]);
                if (j < n - 1) System.out.print(" ");
            }
            System.out.println();
        }
    }
}