#include <fstream>
using namespace std;
int main()
{
    int w = 0;
    int l = 0;
    bool i = false;
    ifstream f("text.in");
    char c;
    while (f.get(c))
    {
        if (isalpha(c))
        {
            l++;
            i = true;
        }
        else if (i)
        {
            w++;
            i = false;
        }
    }
    f.close();
    if (isalpha(c) && i)
    {
        w++;
    }
    ofstream o("text.out");
    o << l / w;
    o.close();
    return 0;
}