#include<iostream>
#include<cstdio>
#include<cstring>
#include <cstdlib>  
#include <cmath>   
#include<cctype>
#include<string>
#include<set>
#include <map>
#include<algorithm>
#include <functional>
#include<vector>
#include<climits>
#include<stack>
#include<queue>
#include <deque>
#include <climits>
#include <typeinfo>
#include <utility> 
#define all(x) (x).begin(),(x).end()
#define rep(i,m,n) for(int i = m;i < n;++i)
#define pb push_back
#define fore(i,a) for(auto &i:a)
#define rrep(i,m,n) for(int i = m;i >= n;--i)
#define INF INT_MAX/2
using namespace std;
using ll = long long;
using R = double;
const ll MOD = 1e9 + 7;
const ll inf = 1LL << 50;
struct edge { ll from; ll to; ll cost; };


int main(){
	string n, m;
	cin >> n >> m;


	reverse(all(m));
	reverse(all(n));

	if (m == "0") { 
		cout << 1 << endl; 
		return 0;
	}
	
	int c;
	if (m.size() == 1) {
		c = (m[0] - '0');
	}
	else {
		c = (m[1] - '0') * 10 + (m[0] - '0');

	}
	c %= 4;

	int e = n[0] - '0';
	int tmp = e;

	if (c == 0) {
		rep(i, 0, 3) {
			e *= tmp;
		}
	}
	else {
		rep(i, 0, c - 1) {
			e *= tmp;
		}
	}
	cout << e % 10 << endl;

	
	return 0;
}