import java.util.Scanner;
public class Main {
public static void main(String[] args) {
// TODO Auto-generated method stub
Scanner scanner=new Scanner(System.in);
int a=scanner.nextInt();
int b=scanner.nextInt();
int count=0;
for(int i=a;i<=b;i++)
{
int j=i;
while(j!=0)
{
if(j%2==1) count++;
j=j/2;
}
}
System.out.println(count);
}
}
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