//样例过了，提交就废。
#include <bits/stdc++.h>
#define MOD 998244353
#define mod 1000000007
#define ll long long
#define ull unsigned long long
#define ui unsigned int
using namespace std;
const int maxn = 1e6+9;
int n,m;
/*void input(int &x[][])
{
    for (int i = 0; i < n; i++)
    {
        for (int j = 0; j < n; j++)
            cin >> x[i][j];
    }
}
void plus(int (&x)[][],int (&y)[][],int (&z)[][])
{
    for (int i = 0; i < n; i++)
    {
        for (int j = 0; j < m; j++)
            z[i][j] = x[i][j] + y[i][j];
    }
}*/
int main()
{
	cin >> n >> m;
	int a[n][m],b[n][m],c[n][m];
	for (int i = 0; i < n; i++)
    {
        for (int j = 0; j < n; j++)
            cin >> a[i][j];
    }
    for (int i = 0; i < n; i++)
    {
        for (int j = 0; j < n; 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 < n; j++)
            cout << c[i][j] << " ";
        cout << '\n';
    }
	return 0;
}