#include<bits/stdc++.h>
using namespace std;

int main(){cin.tie(0);ios::sync_with_stdio(false);
	vector<vector<int>>Trie(800001,vector<int>(26));
	int N;scanf("%d%*c",&N);
	int s=1;
	vector<vector<int>>d(N);
	for(int i=0;i<N;++i){
		int p=0;
		d[i].push_back(p);
		for(int c;c=getchar(),c!='\n';){
			c-='a';
			p=Trie[p][c]=Trie[p][c]?:s++;
			d[i].push_back(p);
		}
	}
	int M;long long X,D;scanf("%d%lld%lld%*c",&M,&X,&D);
	long long NN=N*(long long)(N-1),z=0;
	X%=NN;
	D%=NN;
	--N;
	for(int _=0;_<M;++_){
		int i=X/N,j=X%N;
		if(i>j){
			swap(i,j);
		}else{
			++j;
		}
		X+=D;
		if(X>=NN){
			X-=NN;
		}
		int ok=0,ng=min(d[i].size(),d[j].size());
		while(ng-ok>1){
			int k=ok+ng>>1;
			(d[i][k]==d[j][k]?ok:ng)=k;
		}
		z+=ok;
	}
	cout<<z<<"\n";
	return 0;
}