import java.util.*;
import java.math.*;
public class nmMod{
	public static void main(String... args){
		Scanner scan = new Scanner(System.in);
		String n = scan.next();int m = scan.nextInt();
		BigInteger N = new BigInteger(n);
		BigInteger base = N.pow(m);
		BigInteger t = new BigInteger("10");
		System.out.println(base.mod(t));
	}
}