#include <bits/stdc++.h>
using namespace std;

#undef _P
#define _P(...) (void)printf(__VA_ARGS__)
#define FORR(x,arr) for(auto&& x:arr)
#define FOR(i,a,b) for (int i = (a); i < (b); i++)
#define RFOR(i,a,b) for (int i = (b)-1; i >= (a); i--)
#define REP(i,n) for (int i = 0; i < (n); i++)
#define RREP(i,n) for (int i = (n)-1; i >= 0; i--)
#define ALL(x) (x).begin(), (x).end()
#define ITR(x,c) for(__typeof(c.begin()) x=c.begin();x!=c.end();x++)
#define RITR(x,c) for(__typeof(c.rbegin()) x=c.rbegin();x!=c.rend();x++)
#define BIT(n) (1LL<<(n))
#define SZ(x) ((int)(x).size())
typedef long long ll;
// -------------------------------------

string S;

int main() {
  cin >> S;

  ll cw1 = 0;
  ll cw2 = 0;
  ll ans = 0;

  int L = SZ(S);
  REP(i, L) {
    char c = S[i];
    //printf("%d: %c\n", i, c);
    if (c == 'c') {
      cw1++;
    }
    else if (c == 'w') {
      ans+=cw2;
      cw2+=cw1;
    }
  }

  cout << ans << endl;

  return 0;
}