import java.util.*;

public class Main {
  public static void main(String[] args) {
    Scanner sc = new Scanner(System.in);
    int a = Integer.parseInt(sc.next());
    int b = Integer.parseInt(sc.next());
    int[] day = new int[31];
    for(int i = a - 1; i < b; i++) {
      day[i] = 1;
    }
    int ans = 3 - (day[22] + day[23] + day[24]);
    System.out.println(ans);
  }
}