#include <iostream>
#include <string>

using namespace std;

int getnum(char c){
	return c - '0';
}

int main() {
	string N, M;
	cin >> N >> M;
	int a = getnum(N[N.size() - 1]);
	int b = getnum(M[M.size() - 1]);
	if (M.size() != 1) b += getnum(M[M.size() - 2]) * 10;
	if (M.size() >= 3) b += 100;

	int ans = 1;
	for (int i = 0; i < b; i++)
	{
		ans *= a;
		ans %= 10;
	}
	cout << ans << endl;
}