#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;
	}

	int tmp = base;
	int count = 1;
	while(1) {
		tmp = (tmp * base) % 10;
		count++;
		if (tmp == base) {
			break;
		}
	}

	int multiple = str_m[str_m.size() - 1] - '0';
	if (multiple == 0) { multiple = 1; }

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

	return 0;
}