import std.stdio, std.array, std.string, std.conv, std.algorithm;
import std.typecons, std.range, std.random, std.math, std.container;
import std.numeric, std.bigint, core.bitop;

void main() {
    auto N = readln.chomp.to!int;
    auto S = N.iota.map!(i => tuple(readln.chomp, i)).array;
    auto ttt = readln.split.map!(to!int);
    auto M = ttt[0];
    auto x = ttt[1].to!long;
    auto d = ttt[2].to!long;

    auto I = new long[](M);
    auto J = new long[](M);
    foreach (k; 0..M) {
        I[k] = (x / (N - 1)) + 1;
        J[k] = (x % (N - 1)) + 1;
        if (I[k] > J[k]) swap(I[k], J[k]);
        else J[k] += 1;
        x = (x + d) % (N.to!long * (N.to!long - 1));
    }

    S.sort();
    auto D = new int[](N-1);
    foreach (i; 0..N-1) {
        foreach (j; 0..min(S[i][0].length, S[i+1][0].length)) {
            if (S[i][0][j] == S[i+1][0][j]) D[i]++;
            else break;
        }
    }
    auto rev = new int[](N);
    foreach (i; 0..N) {
        rev[S[i][1]] = i;
    }

    auto st = new SegmentTree(N-1);
    foreach (i; 0..N-1) st.update(i, D[i]);

    long[int][int] mem;
    long ans = 0;
    foreach (k; 0..M) {
        int i = rev[I[k.to!int].to!int - 1];
        int j = rev[J[k.to!int].to!int - 1];
        if (i > j) swap(i, j);
        if (i in mem && j in mem[i]) ans += mem[i][j];
        ans += st.getmin(i, j-1);
    }

    ans.writeln;
}

class SegmentTree {
    int[] table;
    int size;

    this(int n) {
        assert(bsr(n) < 29);
        size = 1 << (bsr(n) + 2);
        table = new int[](size);
        fill(table, 1 << 29);
    }

    void update(int pos, int num) {
        return update(pos, num, 0, 0, size/2-1);
    }

    void update(int pos, int num, int i, int left, int right) {
        if (left == right) {
            table[i] = num;
            return;
        }
        auto mid = (left + right) / 2;
        if (pos <= mid)
            update(pos, num, i*2+1, left, mid);
        else
            update(pos, num, i*2+2, mid+1, right);
        table[i] = min(table[i*2+1], table[i*2+2]);
    }

    int getmin(int pl, int pr) {
        return getmin(pl, pr, 0, 0, size/2-1);
    }

    int getmin(int pl, int pr, int i, int left, int right) {
        if (pl > right || pr < left)
            return 1 << 29;
        else if (pl <= left && right <= pr)
            return table[i];
        else
            return
                min(getmin(pl, pr, i*2+1, left, (left+right)/2),
                    getmin(pl, pr, i*2+2, (left+right)/2+1, right));
    }
}