#include <bits/stdc++.h>
using namespace std;
string s; int g[100009];
int main() {
	cin >> s;
	for(int i = s.size() - 1; i >= 0; i--) g[i] = g[i + 1] + (s[i] == 'w' ? 1 : 0);
	long long ret = 0;
	for(int i = 0; i < s.size(); i++) {
		if(s[i] == 'c') ret += 1LL * g[i] * (g[i] - 1) / 2;
	}
	cout << ret << endl;
	return 0;
}