#include<iostream>
using namespace std;
#include<string.h>

int main() {
	string S;
	int cwwCount = 0;
	cin >> S;
	for (int i = 0;i < S.size();i++) {
		if (S[i] == 'c') {
			for (int j = i + 1;j < S.size();j++) {
				if (S[j] == 'w') {
					for (int t = j + 1;t < S.size();t++) {
						if (S[t] == 'w') {
							cwwCount++;
						}
					}
				}
			}
		}
	}

	cout << cwwCount;
}