#include<bits/stdc++.h>

using namespace std;

struct cww{cww(){ios::sync_with_stdio(false);cin.tie(0);}}star;

template<typename T>
istream& operator>>(istream &is,vector<T> &v){
    for(auto &it:v)is>>it;
    return is;
}
template<typename T>void chmin(T& a, T& b){a=min(a,b);}
template<typename T>void chmax(T& a, T& b){a=max(a,b);}

int main(){
    string S;
    cin>>S;
    int n=S.size();
    int c=0,w=0;
    for(auto &it:S)if(it=='c')c++;else w++;
    cout<<min(c-1,w)<<endl;
    return 0;
}