#include <bits/stdc++.h>

using namespace std;
typedef long long ll;

int main(void) {
  string s;
  cin >> s;

  int sz = s.size();
  vector<int> cumc(sz, 0), cumw(sz, 0);
  for (int i = 0; i < sz; i++) {
    cumc[i] = (s[i] == 'c');
    if (i) cumc[i] += cumc[i - 1];
  }
  for (int i = sz - 1; i >= 0; i--) {
    cumw[i] = (s[i] == 'w');
    if (i != sz - 1) cumw[i] += cumw[i + 1];
  }

  ll ans = 0;
  for (int i = 0; i < sz; i++) {
    if (s[i] != 'w') continue;
    ans += (ll)cumc[i] * (max(0, cumw[i] - 1));
  }
  cout << ans << endl;

  return 0;
}