#include<iostream>
#include <fstream>
using namespace std;
int main()
{
    ifstream f("text.in");
    ofstream g("text.out");
    char c;
    int litere = 0, cuvinte = 0, ok;
    while (!f.eof())
    {
        f.get(c);
        ok=0;
        while (c>='a' && c<='z' || c>='A' && c<='Z')
        {
            ok=1;
            litere++;
            f.get(c);
        }
        if (ok==1)
            cuvinte++;
    }
    g<< litere / cuvinte;
    return 0;
}