#include<iostream>
#include<string>

using namespace std;

int main() {
	string s;
	int i = 0, j = 0, n, a = 0;
	long l;

	cin >> s;
	l = s.length();

	while (-1) {
		if (s[i] == 'c') {
			n = 0;
			for (j = i; j < l; j++) {
				if (s[j] == 'w') {
					n++;
				}
			}
			a = a + n*(n - 1) / 2;
		}
		else if (s[i] == '\0') {
			break;
		}
		i++;
	}

	cout << a << endl;

	return 0;
}