#include <iostream>
using namespace std;

#define ll long long
#define ull unsigned ll

int powmod(ull x,ull y){
   unsigned long long ans = 1;
   while(y--){
      ans *= x;
      ans %= 10;
   }
   return ans;
}

int main(){
   ull n,m;
   cin >> n >> m;
   cout << powmod(n,m) << endl;
}