#include<iostream.h>
#include<stdio.h>
FILE *f,*g;
int main ()
{
 f=fopen("text.in","r");
 g=fopen("text.out","w");
 char c;  int k = 0;
 fscanf(f,"%c",&c);
 long lungimecuvinte=0,nrcuvinte=0,ma;
 while (!feof(f)){
  if((c>='a'&&c<='z')||(c>='A'&&c<='Z'))
  {
    lungimecuvinte++;
    if(!k) nrcuvinte++;
    k=1;
  }
  else
       k=0;
  fscanf(f,"%c",&c);
		     }

ma=lungimecuvinte/nrcuvinte;
fprintf(g,"%ld",ma);
return 0;
}