#include <bits/stdc++.h>

using namespace std;

int main() {
  ios::sync_with_stdio(false);
  cin.tie(nullptr);
  int n, m, k;
  cin >> n >> m >> k;
  char op;
  cin >> op;
  vector<int> a(n), b(m), c(m);
  map<int, int> mp1, mp2, mp3;
  for (int i = 0; i < m; ++i) {
    cin >> b[i];
    ++mp2[b[i] % k];
    c[i] = __gcd(b[i], k);
    mp1[c[i]] = -1;
  }
  for (int i = 0; i < n; ++i) {
    cin >> a[i];
    ++mp3[__gcd(a[i], k)];
  }
  long long ans = 0;
  if (op == '*') {
    for (int i = 0; i < m; ++i) {
      if (mp1[c[i]] != -1) ans += mp1[c[i]];
      else {
        mp1[c[i]] = 0;
        for (auto itr : mp3) {
          if (1LL * c[i] * itr.first % k == 0) mp1[c[i]] += itr.second;
        }
        ans += mp1[c[i]];
      }
    }
  }
  else {
    for (int i = 0; i < n; ++i) {
      ans += mp2[(k - a[i] % k) % k];
    }
  }
  cout << ans << '\n';
  return 0;
}