#include<bits/stdc++.h>
#define int long long
using namespace std;
const int N=505,mod=998244353;
int n,m,k,h,w,V,fac[N],inv[N],e[N][N],b[N][N],f[N][N],g[N][N],c[N];
int ksm(int a,int b=mod-2){int s=1;
	for(;b;b>>=1,a=1ll*a*a%mod)if(b&1)s=1ll*s*a%mod;
	return s;
}
void qm(int &x,int y){x+=y;if(x>=mod)x-=mod;}
int det(int a[N][N],int n){int sum=1;
	for(int i=1;i<=n;i++){int p=i;
		for(int j=i;j<=n;j++)if(a[j][i]){p=j;break ;}
		if(p!=i)swap(a[p],a[i]),sum=-sum;
		int tmp=ksm(a[i][i]);
		for(int j=i+1;j<=n;j++){
			int x=1ll*a[j][i]*tmp%mod;
			for(int k=i;k<=n;k++)qm(a[j][k],mod-1ll*x*a[i][k]%mod);
		}
		sum=1ll*a[i][i]*sum%mod;
//		cout<<i<<" "<<a[i][i]<<endl;
	}
	return (sum+mod)%mod;	
}
int C(int n,int m){return 1ll*fac[n]*inv[n-m]%mod*inv[m]%mod;} 
int calc(int a,int b,int x,int y){
	if(x>a||y<b)return 0;
	return C(a-x+y-b,a-x);
}
void gauss(int n){
	for(int i=1;i<=n;i++){
		int tmp=ksm(b[i][i]);
		for(int j=i+1;j<=n;j++){
			int x=1ll*b[j][i]*tmp%mod;
			for(int k=i;k<=n+1;k++)qm(b[j][k],mod-1ll*x*b[i][k]%mod);
		}
	}
	for(int i=n;i>=1;i--){int x=b[i][n+1];
		for(int j=i+1;j<=n;j++)qm(x,mod-1ll*c[j]*b[i][j]%mod);
		c[i]=1ll*x*ksm(b[i][i])%mod;
//		cout<<i<<" "<<b[i][n+1]<<" "<<b[i][i]<<endl;
	}
}
signed main(){fac[0]=1;
	for(int i=1;i<=N-1;i++)fac[i]=1ll*fac[i-1]*i%mod;
	inv[N-1]=ksm(fac[N-1]);
	for(int i=N-1;i>=1;i--)inv[i-1]=1ll*inv[i]*i%mod;
	scanf("%lld%lld%lld%lld%lld%lld",&n,&m,&k,&h,&w,&V),h+=V-2,w+=V-2,k--;
//	cout<<h<<" "<<w<<endl;
	for(int i=1;i<=k;i++){
		for(int j=1;j<=k;j++){
			g[i][j]=calc(n+i-1,i-1,j-1,m+j-1);
			qm(g[i][j],mod-1ll*calc(n+i-1,i-1,h,w)*calc(h,w,j-1,m+j-1)%mod);
			for(int d=1;d<=h&&d<=w;d++){
				int x=h-d,y=w-d;
				int res=1ll*calc(n+i-1,i-1,x,y)*calc(x,y,j-1,m+j-1)%mod;
				qm(f[i][j],res),qm(g[i][j],mod-res);
			}
		}
	}
	for(int t=1;t<=k+1;t++){
		for(int i=1;i<=k+1;i++)b[t][i]=ksm(t,i-1);
		for(int i=1;i<=k;i++){
			for(int j=1;j<=k;j++){
				e[i][j]=(1ll*f[i][j]*t%mod+g[i][j])%mod;
			}
		}b[t][k+2]=det(e,k);
	}
	gauss(k+1);
	printf("%lld\n",c[V]);
	return 0;
}