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)
