#include<bits/stdc++.h>
using namespace std;
using ll = long long int;
using ld = long double;
#define pow(n,m) powl(n,m)
#define sqrt(n) sqrtl(n)
const ll MAX = 5000000000000000000;
const ll MOD = 0;
void randinit(){srand((unsigned)time(NULL));}
int main(){
    string S,T;
    cin >> S >> T;
    if(T == "0"){
        cout << 1 << endl;
        return 0;
    }
    if(T.size() == 1) T = "0" + T;
    ll a = S[S.size() - 1] - '0',b = T[T.size() - 2] * 10 + T[T.size() - 1] - '0' * 11;
    ll ans = 1;
    b += 100;
    for(ll i = 0;i < b;i++){
        ans = (ans * a) % 10;
    }
    cout << ans << endl;
}