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

using namespace std;

string s;
unsigned int l, c;

int main()
{
    cout << "Hello world!" << endl;

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

    while(!f.eof())
    {
        getline(f,s);
        s.push_back(' ');
        for(int i = 0; i < s.size();i++)
            if(('a' <= s[i] && s[i] <= 'z') || ('A' <= s[i] && s[i] <= 'Z'))
            {
                l++;
                if(!(('a' <= s[i+1] && s[i+1] <= 'z') || ('A' <= s[i+1] && s[i+1] <= 'Z')))
                    c++;
            }
    }
    g << l/c;

    return 0;
}