#include "bits/stdc++.h"
using namespace std;
#define ll long long int
#define rep(i,n) for( int i = 0; i < n; i++ )
#define rrep(i,n) for( int i = n; i >= 0; i-- )
#define REP(i,s,t) for( int i = s; i <= t; i++ )
#define RREP(i,s,t) for( int i = s; i >= t; i-- )
#define dump(x)  cerr << #x << " = " << (x) << endl;
#define INF 2000000000
#define mod 1000000007
#define INF2 1000000000000000000




int main(void)
{
    cin.tie(0);
    ios::sync_with_stdio(false);
	string N, M;
	cin >> N >> M;
	if (M == "0") {
		cout << 1 << endl;
		return 0;
	}
	int A = N[N.length() - 1] - '0';
	M = "0" + M;
	int B1 = M[M.length() - 2] - '0';
	int B0 = M[M.length() - 1] - '0';
	int B = ((B1 * 10 + B0) + 3) % 4;
	int tmp = A;
	rep(i, B) {
		A *= tmp;
	}
	cout << A % 10 << endl;


    return 0;
}