#include<iostream>
using namespace std;

int main(){
    string ns, ms;
    int n, m;
    cin >> ns >> ms;
    n = ns[ns.size()-1]-'0';
    if(ms.size() == 1){
        m = stoi(ms);
    }else{
        m = stoi(ms.substr(ms.size()-2,2));
    }
    m %= 4;
    int a = 1;
    for(int i = 0; i < m; i++){
        a *= n;
    }
    cout << a%10 << endl;
    return 0;
}