#include <cstdio>
#include <cstring>
int main()
{int lung=0,nr=0,i=0;
 char c;
 freopen("text.in","r",stdin);
 freopen("text.out","w",stdout);
 while(scanf("%c", &c)!=EOF)
 {//scanf("%c",&c);
  if (((c>='a') && (c<='z')) || ((c>='A')&& (c<='Z')) )
  {lung++;
   if (!i) {nr++;i=1;}
   }
   else i=0;
  }
 printf("%d",lung/nr);
 
 return 0;}