#include<bits/stdc++.h>
using namespace std;
int main(){
	int a,b,ans=0;
	cin>>a>>b;
	for(int i=a;i<=b;i++){
		if(i>=1000){
			int g,s,b,q;
			g=i%10;
			s=i/100%10;
			b=i/10%10;
			q=i/1000;
			if((g==1&&s==0&&b==2&&q==3)||(g==1&&s==2&&b==0&&q==3)||(g==2&&s==1&&b==0&&q==3)||(g==2&&s==0&&b==1&&q==3)||(g==1&&s==0&&b==2&&q==3)||(g==2&&s==1&&b==0&&q==3)||(g==2&&s==0&&b==3&&q==1)||(g==0&&s==2&&b==1&&q==3)||(g==1&&s==0&&b==2&&q==3)||(g==3&&s==0&&b==1&&q==2)||(g==3&&s==0&&b==2&&q==1)){
				ans++;
				//cout<<i<<" ";
			}
		}else if(i>=100){
			int g,s,b;
			g=i%10;
			s=i/10%10;
			b=i/100;
			if((g==1&&s==0&&b==2)||(g==1&&s==2&&b==0)||(g==2&&s==1&&b==0)||(g==2&&s==0&&b==1)||(g==0&&s==2&&b==1)){
				ans++;
				//cout<<i<<" ";
			}
		}else {
			int g,s;
			g=i%10;
			s=i/10;
			if(g==0&&s==1){
				ans++;
				//cout<<i<<" ";
			}
		}
	}
	cout<<ans<<endl;
	return 0;
}