#include <iostream>
#include <fstream>
#include<ctype.h>
using namespace std;

int main()
{
    char sir;
    int litere=0;
    int cuvinte=0;

    bool ok=false;

    ifstream in("in.txt");
    ofstream out("out.txt");

    while(!in.eof())
    {

         in.get(sir);

         if(isalpha(sir) )
            {
                litere++;
                ok=true;

            }
            else if(ok==true)
            {

                cuvinte++;
                ok=false;

            }


    }


    out<<litere/cuvinte;
    return 0;

}