#include<bits/stdc++.h>
#define int long long
using namespace std;
signed main() {
  int N, M, K;
  char op;
  cin >> N >> M >> K >> op;
  vector<int> A(N), B(M);
  for (auto &x : B) cin >> x;
  for (auto &x : A) cin >> x;

  int sum = accumulate(A.begin(), A.end(), 0LL, [&](int s, int a){return (s + a) % K;});
  int ans = 0;
  for (auto x : B) {
    int t = (op == '+' ? sum + x * N : sum * x);
    ans = (ans + t) % K;
  }
  cout << ans << endl;
}