#include <iostream>
#include <cstdio>
#include <vector>
#include <algorithm>
#include <utility>
#include <string>
#include <cmath>

using namespace std;

int main() {
	string str_n, str_m;

	cin >> str_n >> str_m;
	int base = str_n[str_n.size() - 1] - '0';

	if (str_m == "0") {
		cout << 1 << endl;
		return 0;
	}

	str_m = "0" + str_m;
	int len = str_m.size();
	int multiple = (str_m[len - 2] - '0') * 10 + str_m[len - 1] - '0';
	multiple %= 4;

	if (multiple == 0) { multiple = 4; }

	int ans = (int) pow(base, multiple) % 10;
	cout << ans << endl;

	return 0;
}