#include <fstream>
using namespace std;
ifstream fin("text.in");
ofstream fout("text.out");
int main()
{
     char caracter;
     int potSaCitescCuvinte=0,cuvinte=0,litere=0;
     fin.get(caracter);
     while (!fin.eof())
     {
           if ((caracter>='a'&&caracter<='z')||(caracter>='A'&&caracter<='Z'))
           {
               if (potSaCitescCuvinte==0)
               {
                   potSaCitescCuvinte=1;
               cuvinte++;
               }
                   litere++;
           }
           else
           {
               potSaCitescCuvinte=0;
           }
           fin.get(caracter);
    }
    fout<<litere/cuvinte;
    fin.close();
    fout.close();
    return 0;
}