#include<iostream>
#include<string>
using namespace std;
int main(){
    string N,M;
    int n,m,ans;
    cin >> N >> M;
    n = (int)N[N.length()-1]-48;
    if(M.length() < 2) m = stoi(M);
    else m = stoi(M.substr(M.length()-2));
    if(M == "0") ans = 1;
    else {
        ans = n;
        for(int i=1;i<m%4;i++){
            ans = ans * n % 10;
        }
    }
    cout << ans << endl;;
    return 0;
}