#include <iostream>
#include <vector>
#include <iomanip>
using namespace std;
using ll = long long;

string s;
ll cnt[100010]; // 自分より右にあるwの数

int main()
{
  cin >> s;

  int n = (int)s.size();
  for (int i = 0; i < n; ++i)
  {
    if (s[i] == 'w')
      ++cnt[i];
  }
  for (int i = n; i > 0; --i)
    cnt[i - 1] += cnt[i];

  ll ans = 0;
  for (int i = 0; i < n; ++i)
  {
    if (s[i] == 'c')
    {
      ans += cnt[i] * (cnt[i] - 1) / 2;
    }
  }
  cout << ans << endl;
  return 0;
}