#define fastcall __attribute__((optimize("-O3")))
#pragma GCC optimize(1)
#pragma GCC optimize(2)
#pragma GCC optimize(3)
#pragma GCC optimize("Ofast")
#include<bits/stdc++.h>
#define fr(i,j,k) for(register int i=j;i<=k;++i)
#define rf(i,j,k) for(register int i=j;i>=k;--i)
#define foredge(i,j) for(register int i=head[j];i;i=e[i].nxt)
#define pb push_back
#define Times printf("Time:%.3lf\n",clock()/CLOCKS_PER_SEC)
using namespace std;
inline int read(){
	int x=0;
	bool f=0;
	char c=getchar();
	while(!isdigit(c)) f|=(c=='-'),c=getchar();
	while(isdigit(c)) x=(x<<3)+(x<<1)+(c^48),c=getchar();
	return f?-x:x;
}
inline void write(int x){
    if(x<0){putchar('-');x=-x;}
    if(x>9)write(x/10);
    putchar(x%10+'0');
}
inline void writeln(int x){write(x); puts("");}
inline void writepl(int x){write(x); putchar(' ');}
mt19937 rnd(chrono::steady_clock::now().time_since_epoch().count());
inline int randfind(int l,int r){return rnd()%(r-l+1)+l;}
//inline void init(){
//	int t=read();
//	while(t--) work();
//}
const int Maxn=5e2+10,mod=998244353;
inline int ksm(int x,int y=mod-2){
    int sum=1;
    while(y){
        if(y&1) sum=1ll*sum*x%mod;
        y=y/2;x=1ll*x*x%mod;
    }
    return sum;
}
inline void add(int &x,int y){
    x+=y;if(x>=mod) x-=mod;
}
int n,m,k,r,c,v;
int vis[Maxn][Maxn];
int K[Maxn][Maxn],B[Maxn][Maxn];
inline void init(){
    n=read();m=read();k=read();r=read();c=read();v=read();
    fr(i,1,r+v-1) fr(j,1,c+v-1) vis[i][j]=1;
}
int f[Maxn][Maxn][2];
inline void clear(int x,int y){
    fr(i,0,n+x+1) fr(j,0,m+y+1) f[i][j][0]=f[i][j][1]=0;
}
inline void dp(int x,int y){
    rf(i,n+x,1) fr(j,1,m+y){
        if(vis[i][j]) add(f[i][j][1],f[i][j][0]),f[i][j][0]=0;
        if(i==r+v-1 && j==c+v-1) f[i][j][1]=0;
        add(f[i-1][j][0],f[i][j][0]);add(f[i-1][j][1],f[i][j][1]);
        add(f[i][j+1][0],f[i][j][0]);add(f[i][j+1][1],f[i][j][1]);
    }
}
int a[Maxn][Maxn];
int value[Maxn][Maxn];
inline int getval(){
    int tp=1;
    fr(i,1,k){
        fr(j,i+1,k){
            if(value[i][i]){
                int num=1ll*ksm(value[j][i])*value[i][i]%mod;
                fr(l,i,k) add(value[i][l],mod-1ll*value[j][l]*num%mod);
            }
            if(!value[i][i]){
                fr(l,i,k) swap(value[i][l],value[j][l]);
                tp*=-1;
            }
        }
    }
    int ans;
    if(tp==1) ans=1;
    else ans=mod-1;
    fr(i,1,k) ans=1ll*ans*value[i][i]%mod;
    return ans;
}
inline void into(int val){
    fr(i,0,k) a[val][i]=ksm(val,i);
    fr(i,1,k) fr(j,1,k) value[i][j]=1ll*K[i][j]*val%mod,add(value[i][j],B[i][j]);
    a[val][k+1]=getval();
}
int x[Maxn];
inline void update(){
    fr(i,0,k){
        int id=i;
        fr(j,i,k) if(a[j][i]>a[id][i]) id=j;
        swap(a[id],a[i]);
        int inum=ksm(a[i][i]);
        fr(j,i+1,k+1){
            int now=1ll*inum*a[j][i]%mod;
            fr(l,i,k+1) add(a[j][l],mod-1ll*a[i][l]*now%mod);
        }
    }
    rf(i,k+1,0){
        fr(j,i+1,k+1) add(a[i][k+1],mod-1ll*a[i][j]*x[j]%mod);
        x[i]=1ll*a[i][k+1]*ksm(a[i][i])%mod;
    }
}
inline void work(){
    --k;
    fr(i,1,k) fr(j,1,k){
        f[n+i][i][0]=1;
        dp(i,j);
        K[i][j]=f[j][j+m][1],B[i][j]=f[j][j+m][0];
        clear(i,j);
    }
    fr(i,0,k) into(i);
    update();
    writeln(x[v-1]);
}
signed main(){
    init();work();
	return 0;
}