//http://www.infoarena.ro/problema/text
#include<stdio.h>
#include<cstring>
#include<fstream>
using namespace std;

int main()
{
 long k=0,k1=0,k2=0;
 char c;
 ifstream f("text.in");
 ofstream g("text.out");
 while(!f.eof())
 {
  f>>c;
    if(isalpha(c))
    {
     k1++;
     if(k==0)
     {
      k2++;
      k=-1;
     }
    }
  else
    k=0;
 }
 g<<k1/k2;
 f.close();
 g.close();
 return 0;
}