#define _USE_MATH_DEFINES
#include<stdio.h>
#include<string>
#include<iostream>
#include<cctype>
#include<cstdio>
#include<vector>
#include<stack>
#include<queue>
#include <algorithm>
#include<math.h>
#include<set>
#include<map>
#include<iomanip>

//#include<bits/stdc++.h>



using namespace std;




int main() {
	
	string a,b;
	cin>>a>>b;
	int t=0,n=0;
	n=b[b.size()-1]-'0';
	n%=4;
	t=a[a.size()-1]-'0';
	if(!n)n=4;
	int y=t;
	for(int i=0;i<n-1;i++)
		y*=t;
	cout<<y%10<<endl;

	return 0;
}