#include <bits/stdc++.h>
using namespace std;
using ll = long long;
using P = pair<int, int>;
using T = tuple<int, int, int>;
#define al(a) a.begin(), a.end()
#define ral(a) a.rbegin(), a.rend()
#define sz(a) (int)a.size()
#define rep(i, n) for (int i = 0; i < (n); ++i)
#define rrep(i, n) for (int i = 1; i <= (n); ++i)
#define drep(i, n) for (int i = (n)-1; i >= 0; --i)
#define db(a, b) cout << #a << ": " << a << " " << #b << ": " << b << endl;

int main() {
  string s, t;
  cin >> s >> t;
  //   if (t == "0") {
  //     cout << 1 << endl;
  //     return 0;
  //   }

  int n = s.back() - '0';
  int m = 0;
  if (sz(t) == 1)
    m = t[0] - '0';
  else {
    m = stoi(t.substr(sz(t) - 2));
  }
  m %= 4;
  int ans = 1;
  while (m) {
    ans *= n;
    ans %= 10;
    m--;
  }
  cout << ans << endl;
  return 0;
}