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

int main() {
  int N, M, K;
  char op;
  cin >> N >> M >> K >> op;
  vector<long> A(N), B(M);
  for (auto &b : B) cin >> b;
  for (auto &a : A) cin >> a;

  long ans = 0;
  if (op == '+') {
    for (int i = 0; i < N; i++) (ans += A.at(i) * M) %= K;
    for (int i = 0; i < M; i++) (ans += B.at(i) * N) %= K;
  } else {
    long a = accumulate(A.begin(), A.end(), 0L) % K;
    long b = accumulate(B.begin(), B.end(), 0L) % K;
    ans = a * b % K;
  }
  cout << ans << "\n";
}