#include <fstream>
//#include <string>
using namespace std;
ifstream f("text.in");
ofstream g("text.out");
char a;
int cuvant,litere,k;
int main()
{  f>>a;
	while(a!=EOF)  { a=f.get(); 
	                 if((a>='a' && a<='z') || (a>='A' && a<='Z')) { 
	                                                            litere++;
                                                               if(k==0) { cuvant++; 
                                                                           k=1;
																		}
                                                              }
                      else k=0;
                 }

 /*while(c!=EOF){ c=f.get();
               if(litera(c)){
                             ++lit;
                             if(x==0){
                                        ++cuv;
                                         x=1;
                                     }
                             }
            else
                   x=0;
        }*/
 g<<litere/cuvant;
 f.close();
  g.close();
  return 0;
}