//http://www.infoarena.ro/problema/text
#include <fstream>
#include <cstring>
#include <string>
using namespace std;
int main(){
char c;
int lung=0,ok,y=0,k=0;
ifstream f("text.in");
ofstream g("text.out");
while(!f.eof())
    {
        f.get(c);
    if((c>='a'&&c<='z')||(c>='A'&&c<='Z'))
        {
           lung++;
           if(k==0)
              y++;
              k=1;
        }
    else
    k=0;
      }
g<<(int)lung/y;
return 0;

}