#include<io.h>
#include<string.h>
#include<fstream>
#include<stdio.h>
using namespace std;
const char litere[]="ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz";
int main()
{long long k=0,nr_cuv=0,lungime=0;
 char s,*p;
 fstream f("text.in",ios::in);
 fstream g("text.out",ios::out);
 while(f.get(s))
 {p=strrchr(litere,s);
   if(p)
    {lungime++;
     if(k==0)
     nr_cuv++;
     k=1;
    }
  else
   k=0;
 }
g<<lungime/nr_cuv;
g.close();
f.close();
return 0;
}