#include <iostream>
using namespace std;
bool Istwo(long long sum, long long cnt)
{
	bool sta = false;
	long long count = cnt * 10;
	int datacnt = 0;
	while (count > 0)
	{
		if ((count % 10) > (sum % 10))
			datacnt++;
		count /= 10;
		sum /= 10;
	}
	if (datacnt % 2 == 0)
		sta = true;
	return sta;
}
int main()
{
	long long n, m;
	while (cin >> n >> m)
	{
		long long count = m / 11 - n / 11;
		for (long long i = n / 11; i <= m / 11; i++)
			if (Istwo(i * 11, i) == false)
				count--;
		
		if (n / 11 * 11 == n)
			count++;
		cout << count << endl;
	}
	return 0;
}