#include <algorithm>
#include <cstdio>
#include <cstdlib>
#include <cctype>
#include <cmath>
#include <iostream>
#include <queue>
#include <list>
#include <stack>
#include <map>
#include <numeric>
#include <set>
#include <sstream>
#include <string>
#include <vector>
using namespace std;
#define REP(i,a,n) for(int i=(a); i<(int)(n); i++)
#define rep(i,n) REP(i,0,n)
#define FOR(it,c) for(__typeof((c).begin()) it=(c).begin(); it!=(c).end(); ++it)
#define ALLOF(c) (c).begin(), (c).end()
typedef long long ll;

int main(){
  ios::sync_with_stdio(false);
  string str;
  cin >> str;

  ll c = 0, cw = 0,cww = 0;
  ll ret = 0;
  rep(i,str.length()){
    if(str[i] == 'c'){
      c++;
    }
    if(str[i] == 'w'){
      cww += cw;
      cw += c;
      c=0;
      ret += cww;
    }
  }
  cout << ret << endl;
  return 0;
}