#include<fstream>
#include<cstring>
#include<iostream>
using namespace std;
int main()
{char c;
 int cuv=0,lit=0,ok=0;
 ifstream f("text.in");
 while (!f.eof())
 {c=f.get();
  while ((c>='a' && c<='z') || (c>='A'&& c<='Z'))
   {lit++;
    c=f.get();
	ok=1;
   }
  if (c==' ')
	  {cuv++;
       ok=0;
	  }
  if (c=='-' && ok==1)
	  cuv++;
  ok=0;
 }
ofstream g("text.out");
cout<<lit/cuv;
g<<lit/cuv;
f.close();
 g.close();
 return 0;
}