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

int main() {
	string n, m;
	cin >> n >> m;
	int n2 = n[n.size() - 1] - '0';
	int m2 = m[m.size()-1] - '0';
	if(m.size()>1){
		m2 += (m[m.size() - 2] - '0') * 10;
	}
	if (m2 == 0) {
		cout << 1 << endl;
	}
	else {
		m2 = (m2 % 4 == 0) ? 4 : m2 % 4;
		cout << (int)pow(n2, m2) % 10 << endl;
	}
	return 0;
}