#include<stdio.h>
#include<ctype.h>
int main()
{char c,v;
int s,cuv=0,l=0,ok=0;
FILE *f=fopen("text.in","r");
FILE *g=fopen("text.out","w");
fscanf(f,"%c",&c);
while(!feof(f))
{
	if(isalpha(c))
	   {
		  ok=1;
		  l++;
	   }
	else 
	   {
		  if(ok==1)cuv++;
		  ok=0;
	   }
	v=c;
	fscanf(f,"%c",&c);
}
if(isalpha(v))cuv++;
s=l/cuv;
fprintf(g,"%d",s);
fclose (f);
fclose (g);
return 0;
}