#include <iostream>
#include <string>
#include <vector>
#include <cmath>
#include <algorithm>
#include <cstdlib>
#include <ctime>
#include <cstdio>
#include <functional>
#include <set>
#include <sstream>
#include <map>
#include <queue>
#include <stack>

using namespace std;


int main()
{
	string n,m;
	cin>>n>>m;

	int x=n[n.size()-1]-'0',y=m[m.size()-1]-'0';
	if(m.size()!=1) y+=(m[m.size()-2]-'0')*10;
	y%=4;
	if(y==0 && m!="0") y=4;

	int res=1;
	for(int i=0;i<y;i++){ res*=x; res%=10;}

	cout<<res<<endl;

	return 0;
}