#include<bits/stdc++.h>
#define rep(i,n)for(int i=0;i<n;i++)
using namespace std;
typedef long long ll;
typedef pair<int, int>P;

int main() {
	string s; cin >> s;
	int c = 0, w = 0;
	for (char C : s) {
		if (C == 'c')c++;
		else w++;
	}
	cout << min(c - 1, w) << endl;
}