#include "iostream"
using namespace std;

char letter[100001];
int c;
int w;

int main(){
cin >>letter;
for(int i=0;letter[i]!=NULL;i++){
if(letter[i]=='c')c++;
else w++;
}
if(c-1>w)cout <<w;
else cout <<c-1;
cout<<"\n";
return 0;
}