#include <iostream>

using namespace std;

int main()
{
	int w = 0, c = 0;

	string s;

	cin >> s;

	for (int i = 0; i < s.size(); i++){
		if (s[i] == 'c') c++;
		else w++;
	}
	if (c - 1 <= w){
		cout << c - 1 << endl;	
	}
	else {
		cout << w << endl;
	}
	return (0);
}