# include <iostream>
#include <fstream>
#include <string.h>
using namespace std;
ifstream in ("text.in");
ofstream out ("text.out");
int main ()
{ char a;
   int n=0,c=0;
   int ok=0;
    while(in>>a && !in.eof())
   if((a>='a' && a<='z') || (a>='A' && a<='Z'))
        {n++;
        if(ok==0) c++;
        ok=1;
        }
   else ok=0;

   out<<n/c;
   in.close();
   out.close();
   return 0;
}