#include<iostream>
#include<fstream>
#include<string.h>

using namespace std;

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

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

    int caractere = 0;
    int cuvinte = 0;

    char caracter;
    char ultimul_caracter;

    while (in.good())
    {


        caracter = in.get();
        if (isalpha(caracter))
            ++caractere;

        if ( (caracter == ' ') && (ultimul_caracter != ' ') )
            ++cuvinte;

        ultimul_caracter = caracter;

    }

    of << caractere / cuvinte;

    return 0;
}