#include<fstream>
using namespace std;
int main()
{

    int litere = 0 , cuvinte = 0 , itr = 0;
    char s,pred ='@';
    ifstream in("text.in");
    ofstream out("text.out");
    while(in.get(s))
    {
        if (itr == 0 )
        {
            if (isalpha(s)) {cuvinte++;litere++;continue;}
        }
        if (isalpha(s)) litere++;
        if ((isalpha(s)) && (!isalpha(pred) && itr != 0))
        {
            cuvinte++;
        }
        pred = s;
        ++itr;
    }
    out<<litere/cuvinte;
    out.close();
    in.close();
    return 0;
}