#include <bits/stdc++.h>
using namespace std;
#define int long long
signed main(){
  string N,M;
  cin>>N>>M;
  int n = N[N.size()-1]-'0';
  int m = 0;
  if(M.size() >= 2) m += 10*(M[M.size()-2]-'0');
  m += M[M.size()-1]-'0';
  int a = n;
  for(int i=1;i<m;i++){
    a *= n;
    a %= 10;
  }
  cout<<a<<endl;
}