7a

#define _CRT_SECURE_NO_WARNINGS
#include <vector>
#include <iostream>
#include <string>

using namespace std;

int main()
{
	int a[100][100], b[100][100], c[100][100];
	int n, m;
	cin >> n >> m;
	for (int i = 0; i < n; i++) {
		for (int j = 0; j < m; j++) {
			cin >> a[i][j];
		}
	}
	for (int i = 0; i < n; i++) {
		for (int j = 0; j < m; j++) {
			cin >> b[i][j];
		}
	}

	for (int i = 0; i < n; i++) {
		for (int j = 0; j < m; j++) {
			c[i][j] = a[i][j] - b[i][j];
		}
	}

	for (int i = 0; i < n; i++) {
		for (int j = 0; j < m; j++) {
			cout << c[i][j] << ' ';
		}
		cout << endl;
	}
}