import java.util.Scanner;

public class Main {
	public static void main(String[] args) {
		Scanner sc = new Scanner(System.in);
		String nString = sc.next();
		String mString = sc.next();
		sc.close();
		int a = Character.getNumericValue(nString.charAt(nString.length() - 1));
		int b = Integer.parseInt(mString.substring(mString.length() - 2, mString.length()));
		b %= 4;

		System.out.println((int) (Math.pow(a, b) % 10));

	}
}