#include <iostream>
#include <fstream>
using namespace std;

ifstream f("text.in");
ofstream g("text.out");

char s;
int EsteLitera(char ch)
{
    if('a'<=ch && ch<='z') return 1;
    if('A'<=ch && ch<='Z') return 1;

    return 0;
}
int main()
{
    int nrlit=0, cuvant=0, nrcuv=0;
    while(f.get(s))
   {
       if(EsteLitera(s))
       {
           nrlit++;
           cuvant=1;
       }
       else
       {
           if(cuvant) nrcuv++;
           cuvant=0;
       }

   }
    g<<nrlit/nrcuv<<"\n";
    f.close();
    g.close();
    return 0;
}