#include<iostream>
#include<vector>
#include<algorithm>
using namespace std;
using ll = long long;

int main(void){
  int a[3]={0, 0, 0};
  int l, r; cin >> l >> r;
  for(int i=l; i<=r; i++){
    if(i<=295) a[0]=1;
    else if(i<=416) a[1]=1;
    else a[2]=1;
  }
  cout << a[0]+a[1]+a[2]-1 << endl;
  return 0;
}