N,M,L,K=map(int, input().split())
C,T=[],[]
for i in range(M):
    x,y=map(int, input().split())
    C.append((x+y,x,y))
for i in range(L):
    x,y=map(int, input().split())
    T.append((x+y,x,y))
C=sorted(C)
T=sorted(T)
C.append((2*N+2,N+1,N+1))
E=[[0]*(N+2) for i in range(N+2)]
#1:check 2:tiger
for a,x,y in T:
    E[x][y]=2
#print(C)
#print(T)
dp=[[[0]*(N+3) for w in range(N+3)]for h in range(K+3)]
dp[K][0][0]=1
mod=998244353
for i in range(M+1):
    if i==0:
        sx,sy=0,0
        gx,gy=C[0][1],C[0][2]
    else:
        sx,sy=C[i-1][1],C[i-1][2]
        gx,gy=C[i][1],C[i][2]
    for k in range(K,-1,-1):
        for x in range(sx,gx+1):
            for y in range(sy,gy+1):
                dp[k][x][y]%=mod
                if E[x][y]==0:
                    if x+1<=gx:
                        dp[k][x+1][y]+=dp[k][x][y]
                    if y+1<=gy:
                        dp[k][x][y+1]+=dp[k][x][y]
                else:
                    if k>0:
                        if x+1<=gx:
                            dp[k-1][x+1][y]+=dp[k][x][y]
                        if y+1<=gy:
                            dp[k-1][x][y+1]+=dp[k][x][y]

ans=0 
for k in range(K+1):
    ans+=dp[k][N][N]
    ans%=mod
print(ans)