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

void getNum(int m, int n, int &cnt){
	if(m <= n){
		cnt ++;
		getNum(m * 2, n, cnt);
		getNum(m * 2 + 1, n, cnt);
	}
}

int main(){
	
	int m, n;
	while(cin >> m >> n){
		int cnt = 0;
		getNum(m, n, cnt);
		cout << cnt << endl;
	}
	
	return 0;
}