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

 nrcuvinte++;}

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