#include<stdio.h>
 
int main()
{
    int OK,nrcuv=0,nrlit=0,sum;
    char c;
 
 FILE *f=fopen("text.in","r");
 FILE *g=fopen("text.out","w");
 
 OK=0;
 while (!feof(f))
 {
     fscanf (f,"%c",&c);
     if ((c>='a'&&c<='z')||(c>='A'&&c<='Z'))
         if (OK==0)
         {
             nrcuv++;
             OK=1;
             nrlit++;
         }
         else
         {
             nrlit++;
         }
     else
         OK=0;
 }
 
 fprintf (g,"%d",nrlit/nrcuv);
 
 return 0;
}