#include <iostream>
#include <string>

#define rep(i,a,b) for(int i=(a);i<(b);i++)
using namespace std;

int calc(int n, int m)
{
	int x = 1;
	rep(i,0,m) x = (x * n%10) % 10;

	return x;
}

int main(void)
{
	int n, m;
	string s;
	char c;

	cin >> s;
	c = s[s.size()-1];
	n = (int)c % 48;

	cin >> s;
	c = s[s.size()-1];
	m = (int)c % 48;

	cout << calc(n,m) << endl;

	return 0;
}