#include<iostream>
#include<string>
using namespace std;
int main(void){
	string n, m; cin >> n >> m;
	if (m == "0"){ cout << 1 << endl; return 0; }

	int x = n[n.length() - 1] - '0';
	int y = m[m.length() - 1] - '0';
	if (m.length() >= 2){ y += 10 * (m[m.length() - 2] - '0'); }
	if (m.length() >= 3){ y += 100; }

	int ans = 1;
	for (int i = 0; i < y; i++){
		ans *= x;
		ans %= 10;
	}
	cout << ans << endl;
	return 0;
}