#include<bits/stdc++.h>
using namespace std;
struct pe
{
   int x,y,z;	
};
int main()
{
	struct pe a1;
	struct pe a2;
	struct pe a3;
	int sum=0;
	cin>>a1.x>>a1.y>>a1.z;
	int q;
	cin>>q;
	for(int i=0;i<q;i++)
	{
		cin>>a2.x>>a2.y>>a2.z>>a3.x>>a3.y>>a3.z;
		sum+=(a3.x-a2.x+1)*(a3.y-a2.y+1)*(a3.z-a2.z+1);
	}
	cout<<a1.x*a1.y*a1.z-sum<<endl;
	return 0;
}