#include<iostream>
using namespace std;
int main()
{
int two[4]={6,2,4,8};
int three[4]={1,3,9,7};
int four[2]={6,4};
int seven[4]={1,7,9,3};
int eight[4]={6,8,4,2};
int nine[2]={1,9};
int a,b;
while(cin>>a>>b)
{
a=a%10;
if(a==0||a==1||a==5||a==6)
cout<<a<<endl;
if(a==2)
cout<<two[b%4]<<endl;
if(a==3)
cout<<three[b%4]<<endl;
if(a==4)
cout<<four[b%2]<<endl;
if(a==7)
cout<<seven[b%4]<<endl;
if(a==8)
cout<<eight[b%4]<<endl;
if(a==9)
cout<<nine[b%2]<<endl;
}
return 0;
}