import java.util.Scanner;

class Main{
	public static void main(String[] args) {
		Scanner sc=new Scanner(System.in);
		while(sc.hasNext()){
			String s1=sc.next();
			String s2=sc.next();
			int n=s1.charAt(s1.length()-1)-'0';
			int m=0;
			if(s2.length()<3) m=Integer.valueOf(s2);
			else m=Integer.valueOf(s2.substring(s2.length()-2,s2.length()));
			m%=4;
			int ans=n;
			for(int i=1;i<m;i++) ans*=n;
			System.out.println(ans%10);
		}
	}
}