#include<fstream>

using namespace std;

int main(void)
{
    ifstream in;
    ofstream of;

    in.open("text.in");
    of.open("text.out");

    int cuvinte = 0, caractere = 0;
    bool ok=false;
    while (in.good())
    {

        char caracter;

        in.get(caracter);
        if (isalpha(caracter))
            {
                ++caractere;
                ok = true;
            }
        else
            if (ok)
            {
                ok = false;
                ++cuvinte;
            }


    }

    of << caractere / cuvinte;

    return 0;
}