#include <iostream> 
using namespace std;
int main()
{
	double a,b,arr[10000],ans;
	cin>>a>>b;
	for(int i=a;i<b;i++)
	{
		arr[i]=i;
	}
	for(int i=a;i<b;i++)
	{
		if(arr[i]/100>=1 and arr[i]/100<10)
		{
			if(arr[i]/100==0 or arr[i]/100==1 or arr[i]/100==2)
			{
				if(arr[i]/10%10==0 or arr[i]/10%10==1 or arr[i]/10%10==2) 
				{
					ans++;
				}
			}
		}
	}
	cout<<ans;
	return 0;
}