#include <iostream>
#include <cstring>
using namespace std;

char nr[11];
char numere[100][11];
int p, cnt;

int main()
{
    cin >> nr;
    strcpy(numere[p++], nr);
    for ( int i = 2; i <= 8; i++ )
    {
            char aux[11];
            strcpy(aux, nr);
            for ( int k = 9; k >= i + 1; k-- )
                aux[k] = aux[k - 1];
            for ( int j = 0; j <= 9; j++ )
            {
                aux[i] = j +'0';
                bool gasit = false;
                for ( int f = 0; f < p; f++ )
                if ( strcmp(aux, numere[f]) == 0 )
                    gasit = true;
                if ( !gasit )
                {
                    cnt++;
                    strcpy(numere[p++], aux);
                }
               // cout << aux << '\n';
            }

    }
    for (int i = 0; i <= 9; i++)
    {
        char aux[11];
        strcpy(aux, nr);
        aux[9] = i + '0';
        bool gasit = false;
        for ( int f = 0; f< p; f++ )
            if ( strcmp(aux, numere[f]) == 0 )
                gasit = true;
        if ( !gasit )
        {
             cnt++;
            strcpy(numere[p++], aux);
        }

    }
    for ( int i = 0; i < p; i++ )
        for ( int j = i + 1; j < p; j++ )
            if ( strcmp(numere[i], numere[j]) > 0 )
            {
                char aux[11];
                strcpy(aux, numere[i]);
                strcpy(numere[i], numere[j]);
                strcpy(numere[j], aux);
            }
    cout << p - 1;
    return 0;
}