#include <iostream>
#include <cstring>
#include <map>
using namespace std;
int sol;
string s;
map <int, bool> exista;

inline void Back(int now, int pas, int pas2, bool used)
{
	if(pas == 8)
	{
		if(!exista.count(now))
		{
			exista[now] = true;
			sol++;
		}
		return;
	}
	if(!used)
	{
		for(int i = 0; i < 10; ++i)
			Back(now * 10 + i, pas + 1, pas2, true);
	}
	if(pas2 < 9)
		Back(now * 10 + s[pas2] - '0', pas + 1, pas2 + 1, used);
}

int main()
{
	cin >> s;
	Back(0, 0, 2, false);
	cout << sol << "\n";
	return 0;
}