#include <stdio.h>
#include <values.h>

char c;
int l,n,w;

int main(){
  FILE *f = fopen("text.in","r");
  FILE *g = fopen("text.out","w");
  while (  fscanf(f,"%c",&c)   !=EOF  ){
     if (c>='a'&&c<='z'||c>='A'&&c<='Z') {
	l++;
	w=1;
     }
     else { if (w==1)
		n++;
	    w=0;
     }
  }
  fclose(f);
  fprintf(g,"\n%d",l/n);
  fclose(g);

  return 0;
}