#include <bits/stdc++.h>

using namespace std;

#define fst(t) std::get<0>(t)
#define snd(t) std::get<1>(t)
#define thd(t) std::get<2>(t)
#define unless(p) if(!(p))
#define until(p) while(!(p))

using ll = long long;
using P = std::tuple<int,int>;

const int dx[8] = {-1, 1, 0, 0, -1, -1, 1, 1}, dy[8] = {0, 0, -1, 1, -1, 1, -1, 1};

string N, M;

template <typename T>
T expt(T a, T n, T mod = std::numeric_limits<T>::max()){
    T res = 1;
    while(n){
        if(n & 1){res = res * a % mod;}
        a = a * a % mod;
        n >>= 1;
    }
    return res;
}

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

    std::cin >> N >> M;

    int l1 = N.size(), l2 = M.size();
    int a = N[l1 - 1] - '0', b;
    
    if(l2 == 1){
        b = M[l2 - 1] - '0';
    }else{
        b = 10 * (M[l2 - 2] - '0') + (M[l2 - 1] - '0');

    }

    int res = expt(a, b, 10);
    std::cout << res << std::endl;
}