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

#undef _P
#define _P(...) (void)printf(__VA_ARGS__)
#define FOR(i,a,b) for (int i = (a); i < (b); i++)
#define RFOR(i,a,b) for (int i = (b)-1; i >= (a); i--)
#define REP(i,n) for (int i = 0; i < (n); i++)
#define RREP(i,n) for (int i = (n)-1; i >= 0; i--)
#define ALL(x) (x).begin(), (x).end()
#define ITR(x,c) for(__typeof(c.begin()) x=c.begin();x!=c.end();x++)
#define RITR(x,c) for(__typeof(c.rbegin()) x=c.rbegin();x!=c.rend();x++)
#define BIT(n) (1LL<<(n))
#define SZ(x) ((int)(x).size())
typedef long long ll;
// -------------------------------------

string N, M;

int main() {
  cin >> N >> M;

  int n = N[SZ(N)-1] - '0';

  int m = 0;
  if (SZ(M) > 1) {
    m = stoi(M.substr(SZ(M) - 2));
    m %= 4;
    if (m == 0) m = 4;
  }
  else {
    m = stoi(M);
  }

  int ans = pow(n, m);
  ans %= 10;

  _P("%d\n", ans);

  return 0;
}