#include <bits/stdc++.h>
#define FOR(i,a,b) for(int i = (a); i < (b); ++i)
#define REP(i,n) FOR(i,0,n)
#define RREP(i,n) for(int i = (n) - 1; (i) >= 0; --i)
#define SZ(n) (int)(n).size()
#define ALL(n) (n).begin(), (n).end()
#define MOD LL(1e9 + 7)
#define INF 1000000
using namespace std;
typedef long long LL;
typedef vector<int> VI;
typedef pair<int, int> PI;


int main() {
	string n, m;
	cin >> n >> m;
	int a = (n.back() - '0');
	int b = 0;
	int t = m.size();
	if (t == 1) {
		b = (m.back() - '0');
	}
	else {
		b = (m.back() - '0') + (m[t - 2] - '0') * 10;
	}
	int ans = 0;
	ans = (int)pow(a, b % 4 + 4) % 10;
	if (b == 0 && t == 1) {
		ans = 1;
	}
	cout << ans << endl;
	return 0;
}