#include<bits/stdc++.h>
using namespace std;
#define rep(i, n) for (int i = 0; i < (int)(n); i++)
typedef long long ll;
typedef pair<int,int> P;
int main()
{
    long N, M,K;
    char op;
    cin >> N >> M >>K >> op;
    vector<ll> A(N), B(M);
    ll num=0;
    rep(i, M) cin >> B.at(i);
    rep(i, N) cin >> A.at(i);
    if(op=='+'){
        ll a = 0;
        rep(i, N) a = (a + A.at(i)) % K;
        ll b = 0;
        rep(i, M) b = (b + B.at(i)) % K;
        num = (a * M + b * N) % K;
    }else{
        ll a = 0;
        rep(i, N) a = (a + A.at(i)) % K;
        rep(i, M) num = (num + a * B.at(i))%K;
    }
    cout << num << endl;
}