#define _USE_MATH_DEFINES
#include <algorithm>
#include <cstdio>
#include <functional>
#include <iostream>
#include <cfloat>
#include <climits>
#include <cstring>
#include <cmath>
#include <map>
#include <queue>
#include <set>
#include <sstream>
#include <stack>
#include <string>
#include <time.h>
#include <vector>
using namespace std;

typedef long long ll;
typedef unsigned long long ull;
typedef pair<int, int> i_i;
typedef pair<ll, int> ll_i;
typedef pair<double, int> d_i;
typedef pair<ll, ll> ll_ll;
typedef pair<double, double> d_d;
struct edge { int u, v; ll w; };

ll MOD = 1000000007;
ll _MOD = 1000000009;
double EPS = 1e-10;

int main() {
	string N, M; cin >> N >> M;
	if (M == "0") {
		cout << 1 << endl;
		return 0;
	}
	reverse(N.begin(), N.end());
	int x = N[0] - '0';
	reverse(M.begin(), M.end());
	M.push_back('0');
	int y = (M[0] - '0') + (M[1] - '0') * 10 + 4;
	int z = 1;
	while (y--) z = z * x % 10;
	cout << z << endl;
}