import java.util.*;


public class Main {
	public static void main(String[] args) {
		Scanner sc=new Scanner(System.in);
		String a=sc.next();
		String b = sc.next();
		long c = Long.parseLong(a.charAt(a.length()-1)+"");
		long aa = 0;
		if(b.length()>1){
			aa = Long.parseLong(b.substring(b.length()-2, b.length()));
			if(aa==0)aa=100;
		}else {
			aa=Long.parseLong(b.charAt(b.length()-1)+"");
			
		}
		
		aa-=1;
		aa%=4;
		aa++;
		System.out.println((int)(Math.pow(c, aa)%10));
	}
}