#include<iostream>
using namespace std;
int q[100][100][100]={0};
int main(){
    int w,x,h;
    cin>>w>>x>>h;
    long long int sum=w*x*h;
    int q;
    cin>>q;
    for(int i=1;i<=q;i++)
    {
        int x1,x2,y1,y2,z1,z2;
        cin>>x1>>y1>>z1>>x2>>y2>>z2;
        for(int i3=x1;i3<=x2;i3++)
        {
            for(int i2=y1;i2<=y2;i2++)
            {
                for(int i1=z1;i1<=z2;i1++)
                {
                    if(q[i3][i2][i1]==0)//报错点q[i3][i2][i1]                    {
                        sum--;
                        q[i3][i2][i1]=1;
                    }
                }
            }
        }
    }
    cout<<sum;
    return 0;

}
    //20	28invalid types 'int[int]' for array subscript//23	29	\	[Error] invalid types 'int[int]' for array subscript