#define _CRT_SECURE_NO_WARNINGS
#include <iostream>
#include <cmath>
#include <string>
#include <vector>
#include <algorithm>
#include <queue>
#include <map>
#include <functional>
#include <set>
#include <numeric>
#include <stack>
#include <utility>
#include <time.h>
//#include "util.h"

using namespace std;
typedef unsigned uint;
typedef long long ll;
typedef unsigned long long ull;

template <typename _KTy, typename _Ty> ostream& operator << (ostream& ostr, const pair<_KTy, _Ty>& m) { cout << "{" << m.first << ", " << m.second << "}"; return ostr; }
template <typename _KTy, typename _Ty> ostream& operator << (ostream& ostr, const map<_KTy, _Ty>& m) { if (m.empty()) { cout << "{ }"; return ostr;	} cout << "{" << *m.begin(); for (auto itr = ++m.begin(); itr != m.end(); itr++) { cout << ", " << *itr; } cout << "}"; return ostr; }
template <typename _Ty> ostream& operator << (ostream& ostr, const vector<_Ty>& v) { if (v.empty()) { cout << "{ }"; return ostr; }	cout << "{" << v.front(); for (auto itr = ++v.begin(); itr != v.end(); itr++) { cout << ", " << *itr; }	cout << "}"; return ostr; }
template <typename _Ty> ostream& operator << (ostream& ostr, const set<_Ty>& s) { if (s.empty()) { cout << "{ }"; return ostr; } cout << "{" << *(s.begin()); for (auto itr = ++s.begin(); itr != s.end(); itr++) { cout << ", " << *itr; }	cout << "}"; return ostr; }

#define PI 3.14159265358979323846
#define EPS 1e-6
#define MIN(a,b) ((a)<(b)?(a):(b))
#define MAX(a,b) ((a)>(b)?(a):(b))
#define all(x) (x).begin(), (x).end()

ll ExpMod(ll n, ll p, ll m) {
	ll res = 1;
	for (ll i = 1; i <= p; i <<= 1) {
		if (p & i) {
			res = res * n % m;
		}
		n = n * n % m;
	}
	return res;
}

int yuki0167() 
{
	string N, M;
	ll n, m;
	cin >> N >> M;

	N = N.substr(N.size() - 1);
	n = stoi(N);

	if (M.size() > 2) {
		M = M.substr(M.size() - 2);
		m = stoi(M) + 100;
	}
	else
		m = stoi(M);

	cout << ExpMod(n, m, 10) << endl;

	return 0;
}

int main()
{
	//clock_t start, end;
	//start = clock();

	yuki0167();

	//end = clock();
	//printf("%d msec.\n", end - start);

	return 0;
}