#include <bits/stdc++.h>
using namespace std;
typedef long long ll;

int main(){
    cin.tie(0);
    ios::sync_with_stdio(false);
    int N,M; ll K; cin >> N >> M >> K;
    char op; cin >> op;
    vector<ll> A(N),B(M);
    for (int i=0;i<M;++i) cin >> B[i];
    for (int i=0;i<N;++i) cin >> A[i];
    ll ans=0;
    if (op=='+'){
        for (int i=0;i<N;++i) (ans+=A[i]*M%K)%=K;
        for (int i=0;i<M;++i) (ans+=B[i]*N%K)%=K;
    } else {
        ll sum=0;
        for (int i=0;i<M;++i) (sum+=B[i]%K)%=K;
        for (int i=0;i<N;++i) (ans+=A[i]*sum%K)%=K;
    }
    cout << ans << '\n';
}