import java.util.*;

public class Main {
    public static void main(String[] args) {
        Scanner sc = new Scanner(System.in);
        String NSt = sc.next();
        String MSt = sc.next();
        int ans = pow(NSt,MSt);
        System.out.println(ans);
    }
    static int pow(String A, String B){
        if(B.equals("0")){
            return 1;
        }
        int x = A.length();
        int N = Integer.parseInt(A.substring(x-1));
        int y = B.length();
        if(y<3){y=3;}
        int M = Integer.parseInt(B.substring(y-3));
        int r = M%4;
        int z = N;
        if(r==0){
            z = (int)(Math.pow(N,4))%10;
        }else if(r!=1){
            z = (int)(Math.pow(N,r))%10;
        }
        return z;
    }
}