#include <iostream>
#include <vector>
using namespace std;
int main(){
    long long n,m,k;cin>>n>>m>>k;
    char z;cin>>z;
    vector<long long> A(n);
    long long sm = 0LL;
    vector<long long> B(m);
    for(int i = 0; m > i; i++){
        cin>>B[i];
        sm = (sm+B[i])%k;
    }
    long long ans = 0LL;
    for(int i = 0; n > i; i++){
        cin>>A[i];
        if(z == '+'){
            ans = (ans+(sm+A[i]*m))%k;
        }else{
            ans = (ans+(sm*A[i]))%k;
        }
    }
    cout << ans << endl;
    
    
}