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

int main()
{
 FILE *f,*g;
 long n=0,i=-1,l=0,c=1;
 char sir[1000000];
 f=fopen("text.in","r");
 g=fopen("text.out","w");
 while (!feof(f))
 {
  ++n;
  fscanf(f,"%c",&sir[n]);
 }
 do
 {
  ++i;
  if (!isalpha(sir[n])) ++l;
  else if (!isalpha(sir[n+1])) ++c;

 }
 while (i<n-1);
 fprintf(g,"%ld",l/c);
 return 0;   
}