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

int main(){
	cin.tie(0),ios::sync_with_stdio(false);
	string n,m; cin>>n>>m;
	int rem=0;
	for(auto&&i:m){
		rem=rem*10+i-'0';
		rem%=4;
	}
	int ans=(m.size()==1&&m.front()=='0'?1:n.back()-'0');
	for(int i=0,j=ans;i<rem-1;++i){
		ans*=j;
	}
	cout<<ans%10<<"\n"s;
}