#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;
	if(m.size()>2)rem=*(m.end()-2)*10+*(m.end()-1)-'0'*11;
	else{
		rem=stoi(m);
		if(rem==0){
			cout<<1<<"\n"s;
			return 0;
		}
	}
	rem%=4; rem+=3;
	int ans=n.back()-'0';
	for(int i=0,base=ans;i<rem;++i){
		ans*=base;
	}
	cout<<ans%10<<"\n"s;
}