import java.util.*;

public class Main {
  public static void main(String[] args) {
    Scanner sc = new Scanner(System.in);
    String n = sc.next();
    String m = sc.next();
    int d = Integer.parseInt(String.valueOf(n.charAt(n.length() - 1)));
    int e = 0;
    if(m.length() > 1) {
      e = Integer.parseInt(String.valueOf(m.charAt(m.length() - 2)) + String.valueOf(m.charAt(m.length() - 1)));
    } else {
      e = Integer.parseInt(String.valueOf(m.charAt(0)));
    }
    int e1 = (e % 4);
    if(e1 == 0) e1 = 4;
    int ans = 1;
    for(int i = 0; i < e1; i++) {
      ans = (ans * d) % 10;
    }
    if(d == 0) ans = 0;
    if((m.length() == 1) && (e == 0)) ans = 1;
    System.out.println(ans);
  }
}