#include <bits/stdc++.h>
using namespace std;
#define FOR(i,a,b) for(int i=(a);i<(b);++i)
#define REP(i,n)  FOR(i,0,n)

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