#include<iostream>
#include<string>
#include<algorithm>
#include<functional>
#include<vector>
#include<set>
#include<queue>
#include<list>
#include<stdio.h>
#include<stdlib.h>
#include<map>

#define rep(i,a,b) for(int i=a;i<b;i++)
#define rrep(i,a,b) for(int i=a;i>=b;i--)
#define fore(i,a) for(auto &i:a)
#define all(x) (x).begin(),(x).end()

typedef long long ll;

using namespace std;

int main() {
	
	string s;
	cin >> s;

	int c = 0;
	int w = 0;


	for (int i = 0; i < s.length(); i++) {
		if (s[i] == 'c') {
			++c;
		}
		else {
			++w;
		}
	}

	int cd = c - 2;

	cout << min(cd, w) << endl;
}