import java.util.*;

public class Main {
    public static void main(String[] args) {
        Scanner sc = new Scanner(System.in);
        String NSt = sc.next();
        long N = Long.parseLong(NSt.substring(NSt.length()-1));
        String MSt = sc.next();
        long M = Long.parseLong(MSt.substring(MSt.length()-3));
        long r = powmod(N,M);
        System.out.println(r);
    }
    static long powmod(long a, long b){
        a%=10;
        long x=1;
        if(b==0){
            return 1;
        }else if(b%2==0){
            x = powmod(a*a%10, b/2)%10;
        }else{
            x = a*powmod(a*a%10, b/2)%10;
        }
        return x;
    }
}