#include<fstream.h>
void main()
{
char a='\0';
short last_char=0,last_char2=0;
unsigned long nr_word=0,l=0;
ifstream f("text.in");
ofstream g("text.out");

while (!f.eof())
 {
  f.get(a);
  if ((a>='a' && a<='z') || (a<='Z' && a>='A'))
   {
    if (last_char == 1)
     {
      l++;
     }
    else
     {
      nr_word++;
      l++;
     }
    last_char=1;
   }
  else
   {
    last_char=0;
   }
 }

f<<l/nr_word<<endl;

f.close();
g.close();
}