N,M,T = map(int,input().split())
Map = [[0 for i in range(M)] for j in range(N)]
Vis = [[0 for i in range(M)] for j in range(N)]
SX,SY,FX,FY = map(int,input().split())
xz = [-1,0,0,1]
yz = [0,-1,1,0]
for i in range(T):
    a,b = map(int,input().split())
    Map[a-1][b-1] = 1
ans = 0
def DFS(x,y):
    global ans
    if x==FX and y==FY:
        ans += 1
        return
    if Map[x-1][y-1] ==1:
        return
    for i in range(4):
        xx = x+xz[i]
        yy = y+yz[i]
        if xx>=1 and xx<= N and yy>=1 and yy<=M and Vis[xx-1][yy-1]==0:
           Vis[xx-1][yy-1]=1
           DFS(xx,yy)
           Vis[xx-1][yy-1]=0
    return
DFS(SX,SY)
print(ans)