import java.util.Arrays;
import java.util.Scanner;

public class InspirationLab {
    public static void main(String[] args) {
        Scanner scanner = new Scanner(System.in);

        int rows = scanner.nextInt();
        int colmuns = scanner.nextInt();

        String[][] matrixOne = new String[rows][colmuns];
        String[][] matrixTwo = new String[rows][colmuns];

        for (int row = 0; row < rows; row++) {
            String[] line = scanner.nextLine().split(" ");
            for (int col = 0; col < colmuns; col++) {
                matrixOne[row][col] = line[col];
            }
        }
        for (int row = 0; row < rows; row++) {
            String[] line2 = scanner.nextLine().split(" ");
            for (int col = 0; col < colmuns; col++) {
                matrixTwo[row][col] = line2[col];
            }
        }
        //TODO<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<
        for (int i = 0; i < matrixOne.length; i++) {
            String[] firstArr = matrixOne[i];
            String[] secondArr = matrixTwo[i];
            for (int j = 0; j < firstArr.length; j++) {
                String firstElement = firstArr[j];
                String secondElement = secondArr[j];
                if (firstElement != secondElement) {
                    System.out.println("*");
                }else{
                    System.out.println(firstElement);
                }
            }

        }

    }
}