import java.io.BufferedReader;
import java.io.IOException;
import java.io.InputStreamReader;

public class Main {
	public static void main(String args[]) throws IOException {
		BufferedReader br = new BufferedReader(new InputStreamReader(System.in));
		String str = br.readLine();
		String[] N = str.split("");
		int n = Integer.parseInt(N[N.length - 1]);
		str = br.readLine();
		String[] M = str.split("");
		int m = 0;
		if (M.length == 1)
			m = Integer.parseInt(M[0]);
		else {
			m = Integer.parseInt(M[M.length - 2]) * 10
					+ Integer.parseInt(M[M.length - 1]);
		}
		if (m == 0) {
			if (M.length == 1)
				System.out.println("1");
			else
				m = 4;
		} else {
			int ans = n;
			for (int i = 1; i < m; i++)
				ans = (ans * n) % 10;
			System.out.println(ans);
		}
	}
}