#include <iostream>
#include <string>
using namespace std;
int main(){
	string N;
	cin >> N;
	string M;
	cin >> M;
	if (M == "0"){
		cout << 1 << endl;
		return 0;
	}
	M = "0" + M;
	int a = stoi(N.substr(N.size() - 1));
	int b = stoi(M.substr(M.size() - 2)) % 4 + 4;
	int ans = 1;
	for (int i = 0; i < b; i++){
		ans *= a;
	}
	cout << ans % 10 << endl;
}