# include <stdio.h>

FILE *f,*g;

char c;
long k,l,cuv;

int main()
{

 f=fopen("text.in","r");
 g=fopen("text.out","w");

 k=0; l=0; cuv=0;
 fscanf(f,"%c", &c);
 while (!feof(f))
		{
		 if ((c>='a' && c<='z') || (c>='A' && c<='Z'))
				{
				 l++;
				 k=1;
				}
			else
			 {
			  if (k)
				cuv++;
			  k=0;
			 }
		 fscanf(f,"%c", &c);
		}
 if (c)
	cuv++;
 fclose(f);
 fprintf(g,"%ld", l/cuv);
 fclose(g);

 return 0;
}