#pragma GCC target("avx2")
#pragma GCC optimize("O3")
#pragma GCC optimize("unroll-loops")
#include<iostream>
#include<vector>
using namespace std;
using i32 = int_fast32_t;
using i64 = int_fast64_t;
#define rep(i, n) for (i32 i = 0; i < (i32)(n); i++)
#define all(a) (a).begin(),(a).end()
#define rall(a) (a).rbegin(),(a).rend()
using P = pair<i64,i64>;

int main(){
ios::sync_with_stdio(false);
std::cin.tie(nullptr);
i64 n,m,k;
cin >> n >> m >> k;
char op;
cin >> op;
vector<i64> b(m);
i64 sum = 0;
rep(i,m){
    cin >> b[i];
    sum += b[i];
}
sum %= k;
i64 ans = 0;
rep(i,n){
    i64 a;
    cin >> a;
    if(op == '+'){
        ans = (ans + (((m * a) % k) + sum) % k) % k;
    }else{
        ans = (ans + (a * sum) % k) % k;
    }
}
cout << ans % k << endl;
}