w,x,h = map(int,input().split())
a = [[[0]*h for _ in range(x)] for _ in range(w)]
q = int(input())
count = 0
for _ in range(q):
    x1,y1,z1,x2,y2,z2 = map(int,input().split())
    for i in range(x1,x2+1):
        for j in range(y1,y2+1):
            for k in range(z1,z2+1):
                a[i][j][k] = 1
for i in range(w):
    for j in range(x):
        for k in range(h):
            if a[i][j][k] == 0:
                count += 1
print(count)