//Normal

#define _GLIBCXX_DEBUG
#define ll long long
#include <bits/stdc++.h>
using namespace std;
using Graph = vector<vector<int>>;

void print(auto a){
  cout << a;
}

void prints(auto a){
  cout << a << " ";
}

void prints(){
  cout << " ";
}

void printl(auto a){
  cout << a << endl;
}

void printl(){
  cout << endl;
}

void fix(int n){
  cout << fixed << setprecision(n);
}

int main(){
  string S; cin >> S;
  int s = (int)S.size();
  int c = 0, w = 0;
  
  for(int i = 0; i < s; i++){
    S[i] == 'c' ? c++ : w++;
  }
  
  if(c < 2 or w < 1){
    printl(0);
  }else{
    printl(min(c-1, w));
  }
  
  return 0;
  
}