#include<bits/stdc++.h>
using namespace std;
int main(){
	int a,b,g1,s1,b1,g2,s2,b2,q2,sum=0;
	cin>>a>>b;
	for(int i=a+1;i<=b;i++){
		if(i<1000) {
			g1=i%10;
			s1=i/10%10;
			b1=i/100;
			if((g1==0||g1==1||g1==2) && b1!=0 && (s1==0&&g1!=0 || s1==1&&g1!=1 || s1==2&&g1!=2) &&  (b1==2&&(s1&&b1!=2) || b1==1&&(s1&&g1!=1))){
			    sum=sum+1;
			}
		}
	}
	cout<<sum;
}