#include <bits/stdc++.h>
using namespace std;
typedef long long ll;


int main() {
  int n, m;
  ll k;
  cin >> n >> m >> k;
  char op;
  cin >> op;

  vector<ll> b(m);
  vector<ll> a(n);

  for (int i = 0; i < m; ++i) cin >> b[i];
  for (int i = 0; i < n; ++i) cin >> a[i];

  ll ans = 0;
  if (op == '+') {
    for (int i = 0; i < m; ++i) {
      ans += b[i] * n;
      ans %= k;
    }
    for (int i = 0; i < n; ++i) {
      ans += a[i] * m;
      ans %= k;
    }
  } else {
    ll sum = 0;
    for (int i = 0; i < n; ++i) {
      sum += a[i];
      sum %= k;
    }

    for (int i = 0; i < m; ++i) {
      ans += b[i] * sum;
      ans %= k;
    }
  }
  cout << ans << '\n';
  return 0;
}