import java.util.*;

public class Main {
	public static void main (String[] args) {
		Scanner sc = new Scanner(System.in);
		char[] narr = sc.next().toCharArray();
		int n = narr[narr.length - 1] - '0';
		char[] marr = sc.next().toCharArray();
		int m = 0;
		for (int i = Math.max(0, marr.length - 3); i < marr.length; i++) {
		    m *= 10;
		    m += marr[i] - '0';
		}
		int ans = n;
		for (int i = 1; i < m;  i++) {
		    ans *= n;
		    ans %= 10;
		}
		System.out.println(ans);
	}
}