import java.util.Arrays;
import java.util.Scanner;
import java.util.concurrent.SynchronousQueue;

class Main {
	int N, M;
	int[] X, Y;

	public static void main(String[] args) {
		new Main().run();
	}

	void run() {
		Scanner sc = new Scanner(System.in);
		int N = sc.nextInt();
		String[] s = new String[N];
		for (int i = 0; i < N; ++i) {
			s[i] = sc.next();
		}
		long M = sc.nextLong();
		long x = sc.nextLong();
		long d = sc.nextLong();
		long[] i_ = new long[(int) M];
		long[] j_ = new long[(int) M];
		for (int k = 0; k < M; ++k) {
			i_[k] = (x / (N - 1)) + 1;
			j_[k] = (x % (N - 1)) + 1;
			if (i_[k] > j_[k]) {
				long tmp = i_[k];
				i_[k] = j_[k];
				j_[k] = tmp;
			} else {
				j_[k] = j_[k] + 1;
			}
			x = (x + d) % (N * (N - 1));
		}
		long p = 1_000_000_000 + 7;
		long[][] id = new long[N][];
		for (int i = 0; i < N; ++i) {
			id[i] = new long[s[i].length()];
			for (int j = 0; j < s[i].length(); ++j) {
				id[i][j] = (j - 1 >= 0 ? id[i][j - 1] : 0) * p + (s[i].charAt(j) - 'a');
			}
		}

		int ans = 0;
		for (int k = 0; k < M; ++k) {
			int i = (int) (i_[k]) - 1;
			int j = (int) (j_[k]) - 1;

			int l = 0;
			int r = 1 + Math.min(s[i].length(), s[j].length());
			while (r - l > 1) {
				int m = (l + r) / 2;
				if (id[i][m - 1] == id[j][m - 1]) {
					l = m;
				} else {
					r = m;
				}
			}
			ans += l;
		}
		System.out.println(ans);

	}

	static void tr(Object... objects) {
		System.out.println(Arrays.deepToString(objects));
	}

}