a1=input().split() w=int(a1[0]) x=int(a1[1]) h=int(a1[2]) l=[[[0 for n in range(w)]for n in range(x)]for n in range(h)] q=int(input()) for i in range(q): x1,y1,z1,x2,y2,z2=map(int,input().split()) for j in range(x1,x2+1): for k in range(y1,y2+1): for m in range(z1,z2+1): l[j][k][m]=1 t=0 for a in range(w): for b in range(x): for c in range(h): if l[a][b][c]==0: t+=1 print(t)