#include <iostream>
#include <fstream>
#include <iomanip>
using namespace std;
int main()
{
 char ch;
 int l = 0 , cuv = 0  , i = 0 ;
 fstream f("text.in",ios::in);
 while ( !f.eof() )
 {
  f>>resetiosflags(ios::skipws)>>ch;     
  if ( ch >= 'a' && ch <= 'z' || ch >= 'A' && ch <= 'Z') 
  {
    l++;  
    if( i == 0 )
    {
     cuv++;
     i = 1;  
    }
  }
  else i = 0 ; 
 }
 fstream g("text.out",ios::out);
 g << l / cuv;
 return 0 ;
}