#include<iostream>
#include<iomanip>
#include<string>
#include<algorithm>
#include<vector>
#include<set>
#include<list>
#include<queue>
#include<math.h>
#include<bitset>
using ll = long long;
using namespace std;

int div(string s, int div){
    int i;
    i = stoi(s.substr(0, 1));
    s = s.substr(1);
    while (s.size()){
        i *= 10;
        i += stoi(s.substr(0, 1));
        s = s.substr(1);
        i %= div;
    }
    return i;
}

int main(){
    string n, m;
    cin >> n >> m;
    int t1 = n[n.size()-1] - '0';
    ll r, ans = t1;
    vector<ll> modulo{1, 1, 4, 4, 2, 1, 1, 4, 4, 2};
    
    if (modulo[t1] == 1) {
        cout << n[n.size()-1] << endl;
        return 0;
    } else {
        r = div(m, modulo[t1]);
        while(--r){
            ans *= t1;
            ans %= 10;
        }
        cout << ans << endl;
    }
}