import java.io.BufferedReader;
import java.io.InputStreamReader;
import java.math.BigInteger;

public class No167 {

    public static void main(String[] args) {
        try {
            BufferedReader br = new BufferedReader(new InputStreamReader(
                    System.in));
            BigInteger N = new BigInteger(br.readLine());
            BigInteger M = new BigInteger(br.readLine());
            BigInteger mod = new BigInteger("10");
            System.out.println(N.modPow(M, mod));
        } catch (Exception e) {
            System.err.println("Error:" + e.getMessage());
        }
    }
}