#define  _CRT_SECURE_NO_WARNINGS
#include <stdio.h>
#include <algorithm>
#include <utility>
#include <functional>
#include <cstring>
#include <queue>
#include <stack>
#include <math.h>
#include <iterator>
#include <vector>
#include <string>
#include <set>
#include <math.h>
#include <iostream> 
#include<map>
#include <iomanip>
#include <stdlib.h>
#include <list>
#include <typeinfo>
#include <list>
#include <set>
using namespace std;
#define MAX_MOD 1000000007
#define REP(i,n) for(long long i = 0;i < n;++i)
#define LONG_INF 100000000000000
int main() {
	string a, b;
	cin >> a >> b;
	long long left = a[a.length() - 1] - '0';
	long long right = b[b.length() - 1] - '0';
	if (b.length() != 1) {
		right += (b[b.length() - 2] - '0') * 10;
		if (b.length() != 2) right += (b[b.length() - 3] - '0') * 100;
	}
	long long ans = 1;
	for (int i = 0;i < right % 4||(i == 0&&right != 0);++i) {
		ans *= left;
	}
	cout << ans % 10 << endl;
	return 0;
}