#include <iostream>
using namespace std;
int main() {
    int arr[3][4] = {{1,2,3,4},{5,6,7,8},{9,10,11,12}};
    int res = 0;
    for(int i = 0; i < 3; i++) {
        for(int j = 0; j < 4; j++) {
            if(i % 2 == 0 && j % 2 == 1) {
                res += arr[i][j];
            }
        }
    }
    cout << res << endl;
    return 0;
}