#include <iostream>

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 {
			w++;
		}
	}
	cout << min( c-2, w-1 ) + 1<< endl;

	return 0;
}