#include <iostream>
#include <fstream>
#include <string>

using namespace std;

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

    char c;
    int words = 0, letters = 0;
    bool ok = 0;

    while (!f.eof())
    {
        f.get(c);
        if (isalpha(c))
        {
            letters++;
            ok = true;
        }
        else if (ok == true)
        {
            words++;
            ok = false;
        }
    }
    g<<letters / words;
    return 0;
}