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()));
			if(m==0) System.out.println(1);
			else{
				m%=4; m+=4;
				int ans=1;
				for(int i=1;i<=m;i++) ans*=n;
				System.out.println(ans%10);
			}
		}
	}
}