#include <iostream>
#include <fstream>

using namespace std;
ifstream f("text.in");
ofstream g("text.out");
int b,numar_caractere,numar_litere,numar_cuvinte,ok,rez;
char v[1100];
int main()
{
   while(f>>v)
    {
       for(numar_caractere = 0; v[numar_caractere] != NULL; numar_caractere++)
       putchar(v[numar_caractere]);
       if(v[b]>='a'&& v[b]<='z' || v[b]>='A' && v[b]<='Z')numar_cuvinte++;
       for(b=0;b<numar_caractere;b++)
       {
           if(v[b]>='a'&& v[b]<='z' || v[b]>='A' && v[b]<='Z')  numar_litere++;
           while(v[b]>='a'&& v[b]<='z' || v[b]>='A' && v[b]<='Z')
           {b++;ok=1;}
        if(ok) numar_cuvinte++;

       }



   }
  g<<numar_litere/numar_cuvinte;


}