#include <iostream>
#include <vector>
#include <algorithm>
#include <cmath>
#include <queue>
#include <string>
#include <map>
#include <set>
#include <stack>
#include <tuple>
#include <deque>
#include <array>
#include <numeric>
#include <bitset>
#include <iomanip>
#include <cassert>
#include <chrono>
#include <random>
#include <limits>
#include <iterator>
#include <functional>
#include <sstream>
#include <fstream>
#include <complex>
#include <cstring>
#include <unordered_map>
#include <unordered_set>
using namespace std;

using ll = long long;
constexpr int INF = 1001001001;
constexpr int mod = 1000000007;
// constexpr int mod = 998244353;

template<class T>
inline bool chmax(T& x, T y){
    if(x < y){
        x = y;
        return true;
    }
    return false;
}
template<class T>
inline bool chmin(T& x, T y){
    if(x > y){
        x = y;
        return true;
    }
    return false;
}

int main(){
    ios::sync_with_stdio(false);
    cin.tie(nullptr);

    string s, t;
    cin >> s >> t;
    if(t == "0"){
        cout << 1 << endl;
        return 0;
    }
    int ns = s.length(), nt = t.length();
    
    int N = 0;
    for(int i = 0; i < ns; ++i){
        N = (N * 10 + (s[i] - '0')) % 10;
    }
    
    if(N == 0 || N == 1 || N == 5 || N == 6){
        cout << N << endl;
    }
    else{
        vector<int> nums(1, N);
        for(int i = 1; i < 4; ++i){
            nums.emplace_back(nums.back() * N % 10);
        }
        int M = 0;
        for(int i = 0; i < nt; ++i){
            M = (M * 10 + (t[i] - '0')) % 4;
        }
        cout << nums[(M - 1) % 4] << endl;
    }

    return 0;
}