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();
		int N = Integer.parseInt(str);
		str = br.readLine();
		int M = Integer.parseInt(str);
		if (M == 0)
			System.out.println("1");
		else {
			int ans = N % 10;
			for (int i = 1; i < M; i++)
				ans = (ans * N) % 10;
			System.out.println(ans);
		}
	}
}