/*
100p
*/
#include<stdio.h>
#include<fstream.h>
#include<string.h>

int len, cuv, k;
char c;

void citire()
{
  int sol;
  FILE *in=fopen("text.in","r");
  fscanf(in,"%c",&c);
  while (!feof(in))
     {
	if (c>='a' && c<='z' || c>='A'&& c<='Z')
	  {
	     len++;
	     if (k==0)
		cuv++;
	     k=1;
	  }
	  else k=0;
	  fscanf(in,"%c",&c);
     }
  sol=len/cuv;
  ofstream out("text.out");
  out<<sol;
}

int main()
{
  citire();
  return 0;
}