#include <fstream>

using namespace std;

int main(void)
    {freopen ("text.in", "r", stdin);
     char ch;
     int k=0, cuv=0, len=0;
     while(scanf("%c", &ch)!=EOF)
         { if( ('a'<=ch && ch<='z') || ('A'<=ch && ch<='Z') )
               {len++;
                if(k==0)
                   {cuv++;
                    k=1;
                   }
                } 
            else k=0;
         } 
      freopen ("text.out", "w", stdout);
      printf("%d\n", len/cuv);
      
     return 0;
}