#include <bits/stdc++.h>

using namespace std;

typedef long long int64;
const int INF = 1 << 30;

struct SegmentTree
{
  vector< int > seg;
  int sz;

  SegmentTree(int n)
  {
    sz = 1;
    while(sz < n) sz <<= 1;
    seg.assign(2 * sz - 1, INF);
  }

  void set(int k, int x)
  {
    seg[k + sz - 1] = x;
  }

  void build()
  {
    for(int k = sz - 2; k >= 0; k--) {
      seg[k] = min(seg[2 * k + 1], seg[2 * k + 2]);
    }
  }

  int rmq(int a, int b, int k, int l, int r)
  {
    if(a >= r || b <= l) return (INF);
    if(a <= l && r <= b) return (seg[k]);
    return (min(rmq(a, b, 2 * k + 1, l, (l + r) >> 1),
                rmq(a, b, 2 * k + 2, (l + r) >> 1, r)));
  }

  int rmq(int a, int b)
  {
    return (rmq(a, b, 0, 0, sz));
  }

  void update(int k, int x)
  {
    k += sz - 1;
    seg[k] = x;
    while(k > 0) {
      k = (k - 1) >> 1;
      seg[k] = min(seg[2 * k + 1], seg[2 * k + 2]);
    }
  }

};


int N, M;
int64 x, d;
string S[800000];
int latte[3000000], malta[3000000];

int main()
{
  cin >> N;

  int all = 0;
  for(int i = 0; i < N; i++) {
    cin >> S[i];
    all += S[i].size();
  }

  cin >> M >> x >> d;
  for(int k = 0; k < M; k++) {
    latte[k] = (x / (N - 1)) + 1;
    malta[k] = (x % (N - 1)) + 1;
    if(latte[k] > malta[k]) swap(latte[k], malta[k]);
    else malta[k] = malta[k] + 1;
    x = (x + d) % (1LL * N * (N - 1));
  }


  vector< int > order(N), rev(N);
  iota(begin(order), end(order), 0);
  sort(begin(order), end(order), [&](int a, int b)
  {
    return (S[a] < S[b]);
  });
  for(int i = 0; i < N; i++) rev[order[i]] = i;


  SegmentTree rmq(N);
  for(int i = 1; i < N; i++) {
    int tail = 0, sz = min(S[order[i - 1]].size(), S[order[i]].size());
    while(tail < sz && S[order[i - 1]][tail] == S[order[i]][tail]) ++tail;
    rmq.set(i - 1, tail);
  }
  rmq.build();

  int64 ret = 0;
  for(int i = 0; i < M; i++) {
    auto get = minmax(rev[--latte[i]], rev[--malta[i]]);
    ret += rmq.rmq(get.first, get.second);
  }
  cout << ret << endl;
}