#include <fstream.h>
#include <iomanip.h>
ifstream f("text.in");
ofstream g("text.out");
int ok;
unsigned long lung,cuv;

int main()
{char car;
while(f>>resetiosflags(ios::skipws)>>x)
{if(((car>='a')&&(car<='z'))||((car>='A')&&(car<='Z')))
   {lung++;
    if(!ok){ok=1;cuv++;}
   }
  else ok=0;
}
g<<lung/cuv<<'\n';
f.close();
g.close();
return 0;
}