#include <bits/stdc++.h>

using namespace std;

int main() {
    string s;
    getline(cin, s);
    if (s.size() == 0) {
        cout << 0;
        return 0;
    }
    int res = 0;
    string word = "";
    for (int i = 0; i < s.size(); ++i) {
        if (s[i] == '-') {
            if (i > 0 && i < s.size() - 1) {
            if (((s[i - 1] >= 'a' && s[i - 1] <= 'z') || (s[i - 1] >= 'A' && s[i - 1] <= 'Z')) &&
                ((s[i + 1] >= 'a' && s[i + 1] <= 'z') || (s[i + 1] >= 'A' && s[i + 1] <= 'Z'))) {
                s[i] = 'a';
            }
        }
        }
    }
    for (size_t i = 0; i < s.size(); ++i) {
        if ((s[i] >= 'a' && s[i] <= 'z') || (s[i] >= 'A' && s[i] <= 'Z')) {
            word += s[i];
        } else {
            if (word.size() > 0) {
                res++;
            }
            word = "";
        }
    }
    if (word.size() > 0) {
                res++;
            }

    cout << res << endl;
    return 0;;
}