#include<stdio.h>  
  
int verif(char c)
{
 if(c>=65 && c<=90) return 1;
 if(c>=97 && c<=122) return 1;
 return 0;
}

int main()  
{  
 char c;  
 int len=0,cuv=0,k=0;  
 freopen("text.in","r",stdin);
 freopen("text.out","w",stdout);
 while(scanf("%c",&c)!=EOF)  
 {  
  if(verif(c)==1)
  {
   len++;
   if(k==0) { cuv++; k=1; }
  }
  else k=0;
 }
 printf("%d",len/cuv);
 return 0;
}