#include<iostream>
#include<string>

using namespace std;
int main() {

	string s;

	while ( cin >> s ) {


	int x = 0;
	for (int i = 1; i < s.size() ; ++i) {
		if (s[i] == '-' && s[i-1] == s[i])
			++x;
	}

	cout << x << endl;

	}

	return 0;

}