#include<stdio.h>
int main()
{char c;
 int k,k1,n,cuv;

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

 k1=k=0;
 cuv=0;

 while(!feof(f))
 {fscanf(f,"%c",&c);

  if((c>='a')&&(c<='z')) {k++;
			  if(k1==0) cuv++;
			  k1=1;}   
  else {if((c>='A')&&(c<='Z')) {k++;
				if(k1==0) cuv++;
				k1=1;}
        else k1=0;}

  }


  n=k/cuv;

 fprintf(g,"%d",n);
 fprintf(g,"\n");
 
 fclose(f);
 fclose(g);
 return 0;
 }