#include <iostream>
#include <vector>

using lint = long long;

void solve() {
    int n, m;
    lint k;
    char op;
    std::cin >> n >> m >> k >> op;

    lint xsum = 0, ysum = 0;
    for (int i = 0; i < m; ++i) {
        lint x;
        std::cin >> x;
        xsum += x;
    }
    for (int i = 0; i < n; ++i) {
        lint y;
        std::cin >> y;
        ysum += y;
    }
    xsum %= k, ysum %= k;

    std::cout << (op == '+' ? xsum * n + ysum * m : xsum * ysum) % k
              << std::endl;
}

int main() {
    std::cin.tie(nullptr);
    std::ios::sync_with_stdio(false);

    solve();

    return 0;
}