#include <iostream>
#include <string>
#include <cmath>
using namespace std;

int main(){
   int n,m;
   string a,b;
   cin >> a >> b;
   n = a.back() - '0';
   m = b.back() - '0';
   if(m == 0){
      cout << 1 << endl;
      return 0;
   }
   n %= 10;
   m %= 4;
   if(!m) m = 4;
   cout << int(pow(n,m)) % 10 << endl;
}