/**
 *   @FileName	a.cpp
 *   @Author	kanpurin
 *   @Created	2020.08.25 22:32:27
**/

#include "bits/stdc++.h" 
using namespace std; 
typedef long long ll;

int main() {
    string s;cin >> s;
    vector<ll> c(s.size()+1,0),w(s.size()+1,0);
    ll ans = 0;
    for (int i = 0; i < s.size(); i++) {
        c[i + 1] = c[i];
        if (s[i] == 'c') c[i + 1]++;
    }
    for (int i = s.size(); i >= 1; i--) {
        w[i - 1] = w[i];
        if (s[i] == 'w') w[i - 1]++;
    }
    for (int i = 0; i < s.size(); i++) {
        if (s[i] == 'w') {
            ans += c[i] * w[i];
        }
    }
    cout << ans << endl;
    return 0;
}