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

int main() {
  int N, M, K;
  char op;
  cin >> N >> M >> K >> op;
  vector<long long> A(N), B(M);
  for (int j = 0; j < M; ++j)
    cin >> B[j];
  for (int i = 0; i < N; ++i)
    cin >> A[i];
  long long ans = 0;
  if (op == '+') {
    for (int i = 0; i < N; ++i)
      ans = (ans + (A[i] * M) % K) % K;
    for (int j = 0; j < M; ++j)
      ans = (ans + (B[j] * N) % K) % K;
  } else {
    long long sum_A = 0;
    for (int i = 0; i < N; ++i)
      sum_A = (sum_A + A[i]) % K;
    for (int j = 0; j < M; ++j)
      ans = (ans + (sum_A * B[j]) % K) % K;
  }
  cout << ans << endl;
}