#include <iostream>
using namespace std;
int main()
{
int a = 0, b = 0, contor = 0;
cin >> a >> b;
for( int i = a; i < b; ++i )
{
int copie = i, invers = 0;
while( copie != 0 )
{
invers = invers * 10 + copie % 10;
copie /= 10;
}
if( invers == i )
{
++contor;
}
}
cout << contor;
return 0;
}