#include<iostream>
using namespace std;
int isMagic(int n)
{
int num[20] = { 0 };
int temp = 0, sum = 0, dp[20][20] = { 0 };
while (n)
{
num[temp] = n % 10;
sum = sum + n % 10;
n /= 10;
temp++;
}
if (sum % 2 != 0)
{
return 0;
}
int length = temp;
for (int i = 1; i <= length; i++)
{
for (int j = 0; j <= sum / 2; j++)
{
dp[i][j] = dp[i - 1][j];
if (j >= num[i])
{
int t = dp[i][j - num[i]] + num[i];
if (t > dp[i][j])
dp[i][j] = t;
}
if (j == sum / 2)
{
if (dp[i][j] == sum / 2)
{
return 1;
}
}
}
}
return 0;
}
int main()
{
long long start, end;
int result = 0;
cin >> start >> end;
for (long long i = start; i <= end; i++)
{
if (isMagic(i))
{
result++;
}
}
cout << result << endl;
system("pause");
return 0;
}