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

int main()
{
	int N, M, K;
	char op;
	cin >> N >> M >> K >> op;
	vector<long long> B( M );
	for( int i = 0; i < M; i++ ) {
		cin >> B[i];
	}
	vector<long long> A( N );
	for( int i = 0; i < N; i++ ) {
		cin >> A[i];
	}

	long long ans = 0;
	if( op == '+' ) {
		for( int i = 0; i < N; i++ ) {
			ans += A[i] * M;
		}
		for( int i = 0; i < M; i++ ) {
			ans += B[i] * N;
		}
		ans %= K;
	}
	else {
		long long asum = 0;
		for( int i = 0; i < N; i++ ) {
			asum += A[i];
		}
		for( int i = 0; i < M; i++ ) {
			ans += B[i] * asum;
		}
		ans %= K;
	}

	cout << ans << endl;
}