#include<iostream>
#include<vector>
#include<string>
#include<array>
#include<algorithm>
#include<list>
#include<cmath>
#include<iomanip>
#include<queue>
#include<functional>
#include<climits>
#include<iterator>
#include<unordered_set>
#include<unordered_map>
#include<map>
#include<set>

#include<typeinfo>
#include<numeric>
#include<complex>
#include<memory>
#include<fstream>
#include<chrono>
#include<random>
using namespace std;

const double pi=4*atan(1.0);

constexpr long long mod=static_cast<long long>(1e9+7);

using cWeightEdges=vector<vector<pair<int,int>>>;
using cEdges=vector<vector<int>>;

int main(){
	string str;
	cin>>str;
	int c=0,w=0;
	for(const auto& val:str){
		if(val=='c')++c;
		else ++w;
	}

	--c;
	cout<<min(c,w)<<endl;

	//system("pause");
	return 0;
}