#include <iostream>
using namespace std;
#include <cstdio>
#include <string.h>
#include <stdlib.h>
#include <math.h>

typedef long long ll;
typedef long double lb;

int l[3];

int main(void)
{
   ll i,j,k;
   int memory[2];
   ll n,m;

   ll ans = 0;

   cin >> n >> m;

   ans = 1;

   for(i=0;i<m;i++) ans = (ans*n) % 10;

   cout << ans << endl;

   return 0;
}