#include <iostream>
using namespace std;
 
int main() {
    int n, m;
 
 
    cin >> n;
 
    cin >> m;
 
 
    if (n <= 0 || n > 5 || m <= 0 || m > 5) {
 
        return 1;
    }
 
    int matrix1[5][5], matrix2[5][5];
    float avg[5][5];
 
 
    for (int i = 0; i < n; i++) {
        for (int j = 0; j < m; j++) {
            cin >> matrix1[i][j];
        }
    }
 
 
    for (int i = 0; i < n; i++) {
        for (int j = 0; j < m; j++) {
            cin >> matrix2[i][j];
        }
    }
 
 
    for (int i = 0; i < n; i++) {
        for (int j = 0; j < m; j++) {
            avg[i][j] = (matrix1[i][j] + matrix2[i][j]) / 2.0;
        }
    }
 
 
    for (int i = 0; i < n; i++) {
        for (int j = 0; j < m; j++) {
            cout << avg[i][j] << " ";
        }
        cout << endl;
    }
 
    return 0;
}

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