#include <bits/stdc++.h>
using namespace std;

signed main(){
  string N, M; cin >> N >> M;
  if( M == "0" ) cout << 1 << endl, exit( 0 );
  int ld = N.back() - '0';
  int m = 1;
  for( int i = ld * ld % 10; i != ld; i = i * ld % 10 )
    ++m;
  int x = 0;
  for( int i = 0; i < M.size(); ++i )
    x = x * 10 + M[ i ] - '0',
    x %= m;
  if( x == 0 ) x = m;
  int ans = 1;
  for( int i = 0; i < x; ++i )
    ans = ans * ld % 10;
  cout << ans << endl;
  return 0;
}