#include <iostream>
#include <fstream>
#include <unordered_set>

using namespace std;

ifstream fin("muzica.in");
ofstream fout("muzica.out");

unordered_set<long long int> v(100001);

long long n, m, a, b, c, d, e, f, k;

int main() {
    fin >> n >> m >> a >> b >> c >> d >> e;
    for (int i = 0; i < n; i++) {
        fin >> f;
        v.insert(f);
    }
    for (int i = 0; i < m; i++) {
        if (v.find(a) != v.end()) {
            k++;
            v.erase(a);
        }
        f = (c * b + d * a) % e;
        a = b; b = f;
    }
    fout << k;
}