#include <algorithm>
#include <iostream>
#include <iomanip>
#include <map>
#include <numeric>
#include <set>
#include <sstream>
#include <string>
#include <vector>
#include <cmath>
using namespace std;

#define FOR(i,s,e) for (int i = int(s); i != int(e); i++)
#define FORIT(i,c) for (typeof((c).begin()) i = (c).begin(); i != (c).end(); i++)
#define ISEQ(c) (c).begin(), (c).end()

int main(){
	string N;
	string M;
	cin >> N >> M;

	string N2 = N.substr(N.length()-1,1);
	int Nd = atoi(N2.c_str());

	int Md;
	if (M.length() == 1){
		Md = atoi(M.c_str());
	}else{
		string M2 = M.substr(M.length()-2,2);
		Md = atoi(M2.c_str());
	}

	int ans = 1;
	if(Md == 0) Md += 4;

	FOR(i,0,Md){
		ans = (ans * Nd)%10;
	}

	cout << ans << endl;
	return 0;
}