10 100
1234567890 9876543210
0 0

5
4

import java.math.BigDecimal;
import java.util.Scanner;

public class Main {

	public static void main(String[] args) {
		
		Scanner sc = new Scanner(System.in);
		final int MAXN = 1000+5;
		BigDecimal [] a = new BigDecimal[MAXN];
		a[1]=new BigDecimal(1);
		a[2]=new BigDecimal(2);
		for (int i = 3; i <MAXN; i++) {
			a[i] = a[i-1].add(a[i-2]);
		}
		//System.out.println(a[MAXN-1]);
		//System.out.println(a[MAXN-1].toString().length());
		while(sc.hasNext()){
			BigDecimal start = sc.nextBigDecimal();
			BigDecimal end = sc.nextBigDecimal();
			BigDecimal zero = BigDecimal.ZERO;
			if(start.compareTo(zero)==0&&end.compareTo(zero)==0){
				break;
			}
			int sum = 0;
			for (int i = 1; i < MAXN; i++) {
				if(a[i].compareTo(start)<0){
					continue;
				}else if(a[i].compareTo(end)>0){
					break;
				}else{
					sum++;
				}
			}
			System.out.println(sum);
		}

	}

}