12
 1378
 51202278
 989898989
 4
 7
 9
 6
 8
 12193721
 999999995
 999999999
 11
 999999996
 999999998
 3
 14
 15
 10
 999999994
 1000
 13781378
 5
 999999997
 1000000000
 13
 16
 0

6
 4
 4
 8
 6
 2
 8
 4
 6
 8
 2
 2
 2
 6
 4
 2
 4
 2
 4
 4
 6
 4
 8
 8
 6
 8
 6
 1


import java.util.Scanner;

public class Main {
    public static void main(String[] args) {
        Scanner scn  = new Scanner(System.in);
        long n = scn.nextLong();

        if(n==0){
            System.out.println(1);
        }else{
            n = n%4;
            System.out.println(n==0?6:n==1?8:n==2?4:n==3?2:-1);
        }


    }
}
