#include<stdio.h>
#include<string.h>
#include<stdlib.h>
FILE *f=fopen("text.in","r"), *g=fopen("text.out","w");
char c;
int nr,sum,k;
int main()
{
	while(!feof(f))
	{ fscanf(f,"%c",&c);
		if((c<='z'&&c>='a')||(c>='A'&&c<='Z'))
	      {sum++;
	       if(k==0)  {nr++;
		   k=1;}
		  }
		  else k=0;
	}
		   
	fprintf(g,"%d\n",sum/nr);
	fclose(g);
	return 0;
}