#include <fstream>
#include <cstring>
using namespace std;
string s;
long long nrCuv, nrL;
int main()
{
    ifstream f("text.in");
    ofstream g("text.out");
    getline(f, s);
    nrCuv = nrL = 0;
    for (int i = 0; i <= s.size(); i++)
    {
        if (isalpha(s[i])) nrL++;
        if (isalpha(s[i]) && !isalpha(s[i + 1])) nrCuv++;
    }
    //g << nrL << " " << nrCuv << endl;
    g << nrL / nrCuv;
    return 0;
}