//
// Created by Barichek on 05.03.2024 09:26:58
//

#include <bits/stdc++.h>

#define F first
#define S second
#define MP make_pair
#define PB push_back

#define all(a) a.begin(), a.end()
#define len(a) (int) (a.size())
#define mp make_pair
#define pb push_back
#define fir first
#define sec second

using namespace std;

typedef pair<int, int> pii;
typedef long long ll;
typedef long double ld;

#ifdef Energy_is_not_over
#define DEBUG for (bool ____DEBUG = true; ____DEBUG; ____DEBUG = false)
#define LOG(...) print(#__VA_ARGS__" ::", __VA_ARGS__) << endl

template<class ...Ts>
auto &print(Ts ...ts) { return ((cerr << ts << " "), ...); }

#else
#define DEBUG while (false)
#define LOG(...)
#endif

const int max_n = -1, inf = 1000111222;

int main() {
//    freopen("input.txt", "r", stdin);
//    freopen("output.txt", "w", stdout);
    ios_base::sync_with_stdio(0);
    cin.tie(0);

    ll l,r;
    cin>>l>>r;
    auto good=[&](string s)
    {
        ll res=0;
        for (auto i:s){
            res*=2;
            if (i=='1'){
                res++;
            }
        }
        LOG(s,res);
        return res>=l && res<=r;
    };
    int ans=0;
    for (int a=1;a<62;a++){
        for (int b=1;b<62;b++){
            string s=string(a,'1');
            bool type=1;
            while (len(s)<62){
                if (good(s) && (len(s)>a || (b==1 && len(s)==a))){
                    LOG(s);
                    ans++;
                }

                if (type){
                    s+=string(b,'0');
                }
                else{
                    s+=string(a,'1');
                }
                type^=1;
            }
        }
    }
    cout<<ans<<"\n";

    return 0;
}