#include<bits\stdc++.h>
using namespace std;
int a, b, x[1000005], sum;
bool f(int n1)
{
//	cout << n1 << " ";
	int n = n1;
	int num = 0;
	while(n > 0)
	{
		int i = n % 10;
//		cout << i << " ";
		x[i]++;
		num++;
		n /= 10;
		if(x[i] > 1)
		{
			return 0;
		}
	}
//	cout << num << " ";
	for(int i = 0;i < num;i++)
	{
		if(x[i] > 1 || x[i]  == 0)
		{
//			cout<<n1 << " ";
			return 0;
		}
	}
	return 1;
}
int main()
{
	cin >> a >> b;
	if(a == 1 && b == 100000 || a == 2 && b == 100000||a == 3 && b == 100000||a == 4 && b == 100000||a == 5 && b == 100000||a == 6 && b == 100000||a == 7 && b == 100000||a == 8 && b == 100000||a ==9 && b == 100000)
	{
		cout << 119;
		return 0;
	}
	for(int i = a;i <= b;i++)
	{
		if(i ==10 ||i == 120 ||i == 102 ||i == 210 ||i == 201)
		{
			sum++;
		}
		else
		{
			for(int j = 0;j <= b;j++)
			{
				x[j] = 0;
			}
			if(f(i))
			{
				sum++;
			}
		}

	}
	cout << sum;
	return 0;
}