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

using namespace std;

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

int main()
{
    char c;
    int cuvinte=0,litere=0, ok = 0;
    while (f)
    {
        f.get(c);
        if (isalpha(c))
        {
            litere++;
            ok = 1;
        }
        else if (ok)
        {
            cuvinte++;
            ok = 0;
        }
    }
    if (cuvinte == 0)
        cuvinte = 1;
    g << litere/cuvinte;
}