#include <bits/stdc++.h>
using namespace std;
#define rep(i, n) for(int (i)=0;(i)<(n);(i)++)
int main() {
  int n, m, k;
  cin >> n >> m >> k;
  char op;
  cin >> op;
  vector<long long> b(m);
  vector<long long> a(n);
  rep(i, m) cin >> b[i];
  rep(i, n) cin >> a[i];
  if(op == '+') {
    long long total = 0;
    rep(i, n) {
      a[i] %= k;
      total += a[i] * m;
      total %= k;
    }
    rep(i, m) {
      b[i] %= k;
      total += b[i] * n;
      total %= k;
    }
    cout << total << endl;
  }
  else {
    long long btotal = 0;
    rep(i, m) btotal += b[i];
    btotal %= k;
    long long total = 0;
    rep(i, n) {
      a[i] %= k;
      total += a[i] * btotal;
      total %= k;
    }

    cout << total << endl;
  }
}