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

#define ll long long
#define rep(i, n) for (int i = 0; i < (n); i++)
#define P pair<int, int>

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

  char op;
  cin >> op;
  vector<ll> b(m), a(n);
  rep(i,m) cin >> b[i];
  rep(i,n) cin >> a[i];

  ll suma = 0, sumb = 0;
  rep(i,m) {
    sumb += b[i];
    sumb %= k;
  }
  rep(i,n) {
    suma += a[i];
    suma %= k;
  }

  ll ans = 0;
  if (op == '+') ans = suma*m+sumb*n;
  else ans = suma*sumb;
  ans %= k;
  cout << ans << endl;



}