#include <fstream>
#include <cstring>

using namespace std;

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

int main()
{
    char c;
    int nrcuv, lg, st, dr;
    nrcuv = lg = 0;
    st = dr = 0;
    while (fin.get(c))
        if (c == '\n') break;
        else
            if ((c >= 'a' && c <= 'z') || (c >= 'A' && c <= 'Z'))
                {
                 ++ lg;
                 ++ dr;
                }
            else
                {
                 if (st < dr) ++ nrcuv;
                 ++ dr;
                 st = dr;
                }
    fout << lg / nrcuv << "\n";
    fin.close();
    fout.close();
    return 0;
}