/* -*- coding: utf-8 -*-
 *
 * 346.cc: No.346 チワワ数え上げ問題 - yukicoder
 */

#include<cstdio>
#include<cstdlib>
#include<cstring>
#include<cmath>
#include<iostream>
#include<string>
#include<vector>
#include<map>
#include<set>
#include<stack>
#include<list>
#include<queue>
#include<deque>
#include<algorithm>
#include<numeric>
#include<utility>
#include<complex>
#include<functional>
 
using namespace std;

/* constant */

const int MAX_N = 100000;

/* typedef */

typedef long long ll;

/* global variables */

int wsums[MAX_N + 1];

/* subroutines */

/* main */

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

  int n = s.size();

  wsums[n] = 0;
  for (int i = n - 1; i >= 0; i--)
    wsums[i] = wsums[i + 1] + ((s[i] == 'w') ? 1 : 0);

  ll sum = 0;
  for (int i = 0; i < n; i++)
    if (s[i] == 'c') {
      ll wi = wsums[i + 1];
      sum += wi * (wi - 1) / 2;
    }

  printf("%lld\n", sum);
  return 0;
}