#include <iostream>
#include <iomanip>
#include <string>
#include <cmath>
#include <algorithm>
#include <vector>
#include <set>
#include <map>
#include <unordered_map>
#include <unordered_set>
#include <list>
#include <stack>
#include <queue>
#include <bitset>
#include <numeric>
#include <cassert>
#ifdef DEBUG
#include "./Lib/debug.hpp"
#else
#define dump(...)
template<class T>inline auto d_val(T a, T b) { return a; }
#endif

/* (=＾o＾=) */
#define int ll

/* macro */
#define FOR(i, b, e) for(ll i = (ll)(b); i < (ll)(e); ++i)
#define RFOR(i, b, e) for(ll i = (ll)(e-1); i >= (ll)(b); --i)
#define REP(i, n) FOR(i, 0, n)
#define RREP(i, n) RFOR(i, 0, n)
#define REPC(x,c) for(const auto& x:(c))
#define REPI2(it,b,e) for(auto it = (b); it != (e); ++it)
#define REPI(it,c) REPI2(it, (c).begin(), (c).end())
#define RREPI(it,c) REPI2(it, (c).rbegin(), (c).rend())
#define REPI_ERACE2(it, b, e) for(auto it = (b); it != (e);)
#define REPI_ERACE(it, c) REPI_ERACE2(it, (c).begin(), (c).end())
#define ALL(x) (x).begin(),(x).end()
#define cauto const auto&
/* macro func */
#define SORT(x) do{sort(ALL(x));}while(false)
#define RSORT(x) do{sort((x).rbegin(),(x).rend());}while(false)
#define UNIQUE(v) do{v.erase( unique(v.begin(), v.end()), v.end() );}while(false)
#define MAX(x,y) do{x = std::max(x,y);}while(false)
#define MIN(x,y) do{x = std::min(x,y);}while(false)
#define BR do{cout<<"\n";}while(false)

/* type define */
using ll = long long;
using PAIR = std::pair<ll, ll>;
using VS = std::vector<std::string>;
using VL = std::vector<long long>;
using VVL = std::vector<VL>;
using VVVL = std::vector<VVL>;
using VD = std::vector<double>;
template<class T>
using V = std::vector<T>;

/* using std */
using std::cout;
constexpr char endl = '\n';
using std::cin;
using std::sort;
using std::pair;
using std::string;
using std::stack;
using std::queue;
using std::vector;
using std::list;
using std::map;
using std::unordered_map;
using std::multimap;
using std::unordered_multimap;
using std::set;
using std::unordered_set;
using std::unordered_multiset;
using std::multiset;
using std::bitset;
using std::priority_queue;

/* constant value */
constexpr ll MOD = 1000000007;
//constexpr ll MOD = 998244353;

/* Initial processing  */
struct Preprocessing { Preprocessing() { std::cin.tie(0); std::ios::sync_with_stdio(0); }; }_Preprocessing;

/* Remove the source of the bug */
signed pow(signed, signed) { assert(false); return -1; }

/* define hash */
namespace std { template <>	class hash<std::pair<ll, ll>> { public:	size_t operator()(const std::pair<ll, ll>& x) const { return hash<ll>()(1000000000 * x.first + x.second); } }; }

/* input */
template<class T> std::istream& operator >> (std::istream& is, vector<T>& vec) { for (T& x : vec) is >> x; return is; }

//=============================================================================================

/**
 *	セグメント木を構成する
 *	2methodの変更により調整
 */
template<class T>
class SegmentTree {
private:
	const T initialValue = 1e9;
	const T ignoreValue = 1e9;

	const ll m_size;
	vector<T> m_node;

	ll calcSize(ll n) {
		ll size = 1;
		while (size < n) {
			size *= 2;
		}
		return size;
	}

	/**
	 * 値の更新(更新:=, 加算:+=, etc...)
	 */
	void update(ll k, T x) {
		m_node[k] = x;
	}

	/**
	* 値の併合
	*/
	T merge(T xl, T xr) {
		return std::min(xl, xr);
	}
public:
	SegmentTree(ll n) :
		m_size(calcSize(n)),
		m_node(m_size * 2 - 1, initialValue) {}

	void add(ll itr, T val) {
		ll i = itr + m_size - 1;
		update(i, val);

		while (i > 0) {
			i = (i - 1) / 2;
			m_node[i] = merge(m_node[i * 2 + 1], m_node[i * 2 + 2]);
		}
		/**
		cout << "-- tree -- " << endl;
		REP(i, 2 * m_size - 1) {
			cout << m_node[i] << endl;
		}
		/*//**/
	}

	T query(ll a, ll b) { return query(a, b + 1, 0, 0, m_size); }
	T query(ll a, ll b, ll k, ll l, ll r) {
		if (r <= a || b <= l) { return ignoreValue; }
		if (a <= l && r <= b) { return m_node[k]; }
		return merge(
			query(a, b, 2 * k + 1, l, (l + r) / 2),
			query(a, b, 2 * k + 2, (l + r) / 2, r)
		);
	}
};

signed main() {
	ll n, m, x, d;
	cin >> n;
	VS v(n);
	cin >> v >> m >> x >> d;

	/* rand */
	VL i(m), j(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]) {
			std::swap(i[k], j[k]);
		} else {
			j[k] = j[k] + 1;
		}
		x = (x + d) % (n * (n - 1));
	}

	V<pair<string, ll>> vi;
	vi.reserve(n);
	REP(i, n) { vi.emplace_back(v[i], i); }
	SORT(vi);

	VL at(n);
	REP(i, n) { at[vi[i].second] = i; }

	auto lcp = [](const string& s1, const string& s2) {
		ll ans = 0;
		REP(i, std::min(s1.size(), s2.size())) {
			if (s1[i] != s2[i]) { break; }
			++ans;
		}
		return ans;
	};

	auto tree = SegmentTree<ll>(n);
	REP(i, n - 1) {
		tree.add(i, lcp(vi[i].first, vi[i + 1].first));
	}

	ll ans = 0;
	REP(k, m) {
		auto a = at[i[k] - 1];
		auto b = at[j[k] - 1];
		if (a > b) { std::swap(a, b); }
		ans += tree.query(a, b - 1);
	}
	cout << ans << endl;


}