#include<iostream>

using namespace std;

int main()
{
    unsigned int n,a;
    cin>>a>>n;
    a=a%10;
       if(n%4==1) cout<<a;
       else if(n%4==2) cout<<a*a%10;
             else if(n%4==3) cout<<a*a*a%10; 
                  else if(n%4==0) cout<<a*a*a*a%10;
    system("pause");
    return 0;
}