#define rep(i,n) for(int i=0;i<(int)(n);i++) #define ALL(v) v.begin(),v.end() typedef long long ll; #include using namespace std; const int MOD=998244353; vector> matrixmul(ll m,vector> a,vector> b){ vector> c(m,vector(m,0)); rep(i,m){ rep(j,m){ rep(k,m) c[i][j]=(c[i][j]+a[i][k]*b[k][j]%MOD)%MOD; } } return c; } vector> matrixpow(ll m,vector> vec,ll n){ vector> ans(m,vector(m,0)); rep(i,m) ans[i][i]=1; while(n){ if(n&1) ans=matrixmul(m,ans,vec); vec=matrixmul(m,vec,vec); n>>=1; } return ans; } ll modinv(ll a,ll m){ ll b=m,u=1,v=0; while(b){ ll t=a/b; a-=t*b; swap(a,b); u-=t*v; swap(u,v); } u%=m; if(u<0) u+=m; return u; } int main(){ ios::sync_with_stdio(false); std::cin.tie(nullptr); ll ma,na,s,mb,nb,t,k; cin>>ma>>na>>s>>mb>>nb>>t>>k; ll pa=ma*modinv(na,MOD)%MOD; ll qa=(1LL-pa+MOD)%MOD; ll pb=mb*modinv(nb,MOD)%MOD; ll qb=(1LL-pb+MOD)%MOD; ll n=s+t+1; vector> A(n,vector (n)),B(n,vector (n)); A[0][0]=1,B[0][0]=1,A[n-1][n-1]=1,B[n-1][n-1]=1; for(int j=1;j<=n-2;j++) A[0][j]=A[0][j-1]*pa%MOD; for(int i=1;i<=n-2;i++){ for(int j=i;j<=n-2;j++){ if(j==i) A[i][j]=qa; else A[i][j]=A[i][j-1]*pa%MOD; } } for(int j=n-2;j>=1;j--) B[n-1][j]=B[n-1][j+1]*pb%MOD; for(int i=1;i<=n-2;i++){ for(int j=i;j>=1;j--){ if(j==i) B[i][j]=qb; else B[i][j]=B[i][j+1]*pb%MOD; } } vector> C=matrixmul(n,B,A); vector> D=matrixpow(n,C,k); cout<