#include <fstream>

using namespace std;

ifstream fin("text.in");
ofstream fout("text.out");

char s;
int lg, cuv;

int main()
{
    bool ok = false;
    while (fin.get(s))
    {
        while ((s >= 'a' && s <= 'z') || (s >= 'A' && s <= 'Z'))
        {
            ++lg;
            ok = true;
            fin.get(s);
        }
        if (ok == true)
        {
            ++cuv;
            ok = false;
        }
    }

    fout << lg / cuv;

    fin.close();
    fout.close();
}