#include <iostream>
using namespace std;

int main()
{
    int a,b,h;
    cin >> a >> b >> h;
    int cm = a*b*h;
    int q;
    cin >> q;
    for(int i = 1;i <= q;i++)
    {
        int x,y,z,x2,y2,z2;//切割坐标
        cin >> x >> y >> z >> x2 >> y2 >> z2;
        x--;
        y--;
        z--;
        x2--;
        y2--;
        z2--;
        cm -= (abs(x2 - x) + 1) * (abs(y2 - y) + 1) * (abs(z2 - z) + 1);
    }
    cout << cm << endl;
    
    return 0;
}