#include "bits/stdc++.h"
#define rep(i,n) for(int i=0;i<n;i++)
using namespace std;

typedef long long ll;

int main() {
    ll N, M, K, Asum = 0, Bsum = 0;
    char op;
    cin >> N >> M >> K >> op;
    vector<ll> A(N), B(M);
    rep(i, M) {
        cin >> B[i];
        Bsum += B[i];
    }
    rep(i, N) {
        cin >> A[i];
        Asum += A[i];
    }
    Asum %= K;
    Bsum %= K;
    if (op == '+') {
        Asum *= M;
        Asum %= K;
        Bsum *= N;
        Bsum %= K;
        cout << (Asum + Bsum) % K << endl;
    } else {
        cout << Asum * Bsum % K << endl;
    }
}