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// подготовка к кр
#include <iostream>
using namespace std;
int main()
{
int a, b;
cin >> a >> b;
int i = 0;
while (a < b){
a += 1;
if (a % 10 == (a % 100) / 10 && a != b - 1){
i += 1;
}
}
cout << i;
return 0;
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