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

int main ()
{
    freopen("text.in","r",stdin);
    freopen("text.out","w",stdout);
    
    int n,i,k,lit=0;;
    char l[2000000];
    int cuv=0,cuv2=0;
    gets(l);
    n=strlen(l)-1;
    for(i=0;i<=n;i++)
    {
                         if(isalpha(l[i])!=0)
                         {
    if(cuv2==0)
   {
      cuv++;
      cuv2=1;
      lit++;}
      else
      lit++;
                         }
                         else
                         cuv2=0;}
                         printf("%d\n",lit/cuv);
                  //       printf("%d\n%d",lit,cuv);
                         return 0;
                         }