#include <iostream>
#include <string>
#include <algorithm>
using namespace std;

int main() {
	string s;cin>>s;
	int c=0,w=0;
	for(int i=0;i<s.size();i++)if(s[i]=='c')c++;else break;
	w=s.size()-c;
	cout<<min(c-1,w)<<endl;
	return 0;
}