//Normal

#define _GLIBCXX_DEBUG
#define ll long long
#include <bits/stdc++.h>
using namespace std;
using Graph = vector<vector<int>>;

void print(auto a){
  cout << a;
}

void prints(auto a){
  cout << a << " ";
}

void prints(){
  cout << " ";
}

void printl(auto a){
  cout << a << endl;
}

void printl(){
  cout << endl;
}

void fix(int n){
  cout << fixed << setprecision(n);
}

int siz(string s){
  return (int)s.size();
}

int main(){
  int N, M, K; cin >> N >> M >> K;
  char C; cin >> C;
  vector<ll> A(N);
  ll B = 0;
  for(int i = 0; i < M; i++){
    int X; cin >> X;

    B += X;
  }
  for(int i = 0; i < N; i++){
    cin >> A[i];

    A[i] %= K;
  }

  ll sum = 0;
  for(int i = 0; i < N; i++){
    C == '+' ? sum += A[i]*M+B : sum += A[i]*B;

    sum %= K;
  }

  printl(sum);

  return 0;
}