#include <bits/stdc++.h>
using namespace std;
using namespace placeholders;
using LL = long long;
using ULL = unsigned long long;
using VI = vector<int>;
using VVI = vector<vector<int> >;
using VS = vector<string>;
using SS = stringstream;
using PII = pair<int, int>;
using VPII = vector<pair<int, int> >;
template <typename T = int>
using VT = vector<T>;
template <typename T = int>
using VVT = vector<vector<T> >;
template <typename T = int>
using LIM = numeric_limits<T>;
template <typename T>
inline istream &operator>>(istream &s, vector<T> &v) {
  for (T &t : v) {
    s >> t;
  }
  return s;
}
template <typename T>
inline ostream &operator<<(ostream &s, const vector<T> &v) {
  for (int i = 0; i < int(v.size()); ++i) {
    s << (" " + !i) << v[i];
  }
  return s;
}
template <typename T>
inline T fromString(const string &s) {
  T res;
  istringstream iss(s);
  iss >> res;
  return res;
}
template <typename T>
inline string toString(const T &a) {
  ostringstream oss;
  oss << a;
  return oss.str();
}
template <typename T>
inline void chmin(T &a, const T &b) {
  a = std::min(a, b);
}
template <typename T>
inline void chmax(T &a, const T &b) {
  a = std::max(a, b);
}
int main() {
  cin.tie(0);
  ios::sync_with_stdio(false);
  VT<LL> onezeros;
  for (int n = (int)(1); n < (int)(63); ++n) {
    LL all = (1LL << n) - 1;
    for (int d = (int)(0); d < (int)(n - 1); ++d) {
      onezeros.push_back(all ^ (1LL << d));
    }
  }
  LL a, b;
  cin >> a >> b;
  cout << count_if(begin(onezeros), end(onezeros), [&](const LL &t) {
    return a <= t && t <= b;
  }) << endl;
  return 0;
}
