# include <fstream>
# define    verif(a)    ((a>='a'&&a<='z')||(a>='A'&&a<='Z'))
using namespace std;
ifstream fin("text.in");
ofstream fout("text.out");

char c;
int w, l;
bool s;

int main() {
    while (fin.get(c)) {
        if (verif(c)) {
            ++l;
            s = true; /// am avut gasit o litera, deci un cuvant
        } else if (s) {
            ++w;
            s = false;
        }
    }

    fout << (l/w);
    return 0;
}