#include<stdio.h>
#include<string.h>
#include<conio.h>

FILE *fin=fopen("text.in","r");
FILE *fout=fopen("text.out","w");

void main()
{ char s[100],*p,m[100][100],*c="- ";
  int i=0,j=0,q=0;
  fgets(s,100,fin);
  p=strtok(s,c);
  while(p!=NULL)
  {
	  strcpy(m[i],p);
	  i++;
	  p=strtok(NULL,c);
  } 
  for(j=0;j<i;j++) 
	  q=q+strlen(m[j]);
  fprintf(fout,"%d",q/i);
  _getch();
  fclose(fout);
}