#include <bits/stdc++.h>

using namespace std;

typedef long long ll;
typedef vector<int> vi;
typedef vector<ll> vl;
typedef complex<double> P;
typedef pair<int,int> pii;
#define REP(i,n) for(ll i=0;i<n;++i)
#define REPR(i,n) for(ll i=1;i<n;++i)
#define FOR(i,a,b) for(ll i=a;i<b;++i)

#define DEBUG(x) cout<<#x<<": "<<x<<endl
#define DEBUG_VEC(v) cout<<#v<<":";REP(i,v.size())cout<<" "<<v[i];cout<<endl
#define ALL(a) (a).begin(),(a).end()

#define MOD (ll)(1e9+7)
#define ADD(a,b) a=((a)+(b))%MOD
#define FIX(a) ((a)%MOD+MOD)%MOD

ll wc[125252];

int main(){
  string s;
  cin>>s;
  ll res = 0;
  int n = s.size();
  wc[n]=0;
  for(int i=n-1;i>=0;--i){
    wc[i]=wc[i+1];
    if(s[i]=='w'){
      wc[i]++;
    }
  }
  REP(i,n){
    if(s[i]=='c'){
      res += wc[i]*(wc[i]-1ll)/2ll;
    }
  }
  cout<<res<<endl;
  return 0;
}