#include<bits/stdc++.h>

#define REP(i,s,n) for(int i=s;i<n;i++)
#define rep(i,n) REP(i,0,n)

using namespace std;

string n,m;

int main(){
  cin >> n >> m;
  if( m == "0" ) {
    cout << 1 << endl;
    return 0;
  }
  int a;
  a = n[n.size()-1] - '0';
  vector<int> loop;
  bool used[10];
  memset(used,false,sizeof(used));
  int cur = a;
  while( !used[cur] ){
    used[cur] = true;
    loop.push_back(cur);
    ( cur *= a ) %= 10;
  }
  int pt = 0;
  rep(i,m.size()) {
    pt *= 10;
    ( pt += (m[i]-'0') ) %= (int)loop.size();
  }
  ( ( pt -= 1 ) += (int)loop.size() ) %= (int)loop.size();
  cout << loop[pt] << endl;
  return 0;
}