using System;
using System.Collections;
using System.Collections.Generic;
using System.IO;
using System.Linq;
using System.Numerics;
using System.Text;
using static System.Console;
using static System.Convert;
using static System.Math;
using static Extentions;

class IO
{
    int idx;
    string[] input;

    public IO(TextReader reader)
    {
        input = reader.ReadToEnd().Split(new[] { " ", "\n", "\r" },
            StringSplitOptions.RemoveEmptyEntries);
    }

    T Get<T>(Func<string, T> parser) => parser(input[idx++]);

    public string S => Get(s => s);
    public char C => Get(char.Parse);
    public int I => Get(int.Parse);
    public long L => Get(long.Parse);
    public double F => Get(double.Parse);
    public decimal D => Get(decimal.Parse);
    public BigInteger B => Get(BigInteger.Parse);

    T[] Gets<T>(int n, Func<string, T> parser)
        => input.Skip((idx += n) - n).Take(n).Select(parser).ToArray();

    public string[] Ss(int n) => Gets(n, s => s);
    public char[] Cs(int n) => Gets(n, char.Parse);
    public int[] Is(int n) => Gets(n, int.Parse);
    public long[] Ls(int n) => Gets(n, long.Parse);
    public double[] Fs(int n) => Gets(n, double.Parse);
    public decimal[] Ds(int n) => Gets(n, decimal.Parse);
    public BigInteger[] Bs(int n) => Gets(n, BigInteger.Parse);

    public void Write<T>(params T[] xs) => WriteLine(string.Join(" ", xs));
    public void Write(params object[] xs) => WriteLine(string.Join(" ", xs));
}

#region http://qiita.com/Camypaper/items/de6d576fe5513743a50e
public class StreamScanner
{
    public StreamScanner(Stream stream) { str = stream; }
    private readonly Stream str;
    private readonly byte[] buf = new byte[1024];
    private int len, ptr;
    public bool isEof = false;
    public bool IsEndOfStream { get { return isEof; } }
    private byte read()
    {
        if (isEof) throw new EndOfStreamException();
        if (ptr >= len)
        {
            ptr = 0;
            if ((len = str.Read(buf, 0, 1024)) <= 0)
            {
                isEof = true;
                return 0;
            }
        }
        return buf[ptr++];
    }
    public char Char()
    {
        byte b = 0;
        do b = read();
        while (b < 33 || 126 < b);
        return (char)b;
    }
    public string Scan()
    {
        var sb = new StringBuilder();
        for (var b = Char(); b >= 33 && b <= 126; b = (char)read())
            sb.Append(b);
        return sb.ToString();
    }
    public long Long()
    {
        long ret = 0; byte b = 0; var ng = false;
        do b = read();
        while (b != '-' && (b < '0' || '9' < b));
        if (b == '-') { ng = true; b = read(); }
        for (; true; b = read())
        {
            if (b < '0' || '9' < b)
                return ng ? -ret : ret;
            else ret = ret * 10 + b - '0';
        }
    }
    public int Integer() { return (int)Long(); }
    public double Double() { return double.Parse(Scan(), System.Globalization.CultureInfo.InvariantCulture); }
}
#endregion

class SparseTable
{
    int[] xs, logTable;
    int[,] table;
    int n;

    public SparseTable(int[] xs)
    {
        n = xs.Length;
        this.xs = xs;

        logTable = new int[n + 1];
        for (var i = 2; i <= n; i++) logTable[i] = logTable[i >> 1] + 1;

        table = new int[n, logTable[n] + 1];
        for (var i = 0; i < n; i++) table[i, 0] = i;
        for (var k = 1; (1 << k) < n; k++)
        {
            for (var i = 0; i + (1 << k) <= n; i++)
            {
                var a = table[i, k - 1];
                var b = table[i + (1 << (k - 1)), k - 1];
                table[i, k] = xs[a] < xs[b] ? a : b;
            }
        }
    }

    public int Query(int i, int j)
    {
        var k = logTable[j - i];
        return Min(xs[table[i, k]], xs[table[j - (1 << k) + 1, k]]);
    }
}

static class Extentions
{
    public static void Swap<T>(ref T x, ref T y)
    {
        var tmp = x;
        x = y;
        y = tmp;
    }
}

static class Program
{
    public static void Main()
    {
        var sw = new StreamWriter(OpenStandardOutput()) { NewLine = "\n" };
#if DEBUG
        sw.AutoFlush = true;
#else
        sw.AutoFlush = false;
#endif
        SetOut(sw);
        Solve(new StreamScanner(OpenStandardInput()));
        Out.Flush();
    }

    static int Lcp(string a, string b)
    {
        var cnt = 0;
        var len = Min(a.Length, b.Length);
        for (var i = 0; i < len; i++) if (a[i] == b[i]) cnt++; else break;
        return cnt;
    }

    static void Solve(StreamScanner sc)
    {
        var n = sc.Integer();
        var s = new string[n];
        for (var i = 0; i < n; i++) s[i] = sc.Scan();
        var m = sc.Integer();
        var x = sc.Long();
        var d = sc.Long();

        var bsi = new int[n];
        var asi = new int[n];
        for (var i = 0; i < n; i++) bsi[i] = asi[i] = i;
        Array.Sort(bsi, (a, b) => s[a].CompareTo(s[b]));
        Array.Sort(asi, (a, b) => bsi[a].CompareTo(bsi[b]));

        var ts = new string[n];
        for (var i = 0; i < n; i++) ts[i] = s[bsi[i]];
        s = ts;

        var lcplen = new int[n - 1];
        for (var i = 0; i < n - 1; i++) lcplen[i] = Lcp(s[i], s[i + 1]);

        var st = new SparseTable(lcplen);
        var ans = 0L;
        var mod = (long)n * (n - 1);

        for (var k = 0; k < m; k++)
        {
            var i = x / (n - 1);
            var j = x % (n - 1);
            if (i > j) Swap(ref i, ref j);
            else j++;

            var p = asi[i];
            var q = asi[j];
            if (p > q) Swap(ref p, ref q);
            var t = st.Query(p, q - 1);
            ans += t;

            x = (x + d) % mod;
        }

        WriteLine(ans);
    }
}