#include<bits/stdc++.h>
using namespace std;

signed main(){
    ios_base::sync_with_stdio(0);
    cin.tie(0);
    cout.tie(0);

    int l,r;
    cin>>l>>r;
    int ans=1;
    
    if(r<=295){
        ans=1;
    }else if(r<=416){
        ans=2;
    }else{
        ans=3;
    }

    if(l<=295){
        ans-=1;
    }else if(l<=416){
        ans-=2;
    }else{
        ans-=3;
    }
    cout<<ans<<'\n';
    
}