#include <iostream>
#include <vector>
#include <algorithm>
#include <cmath>
#include <iomanip>
#include <stack>
#include <algorithm>
#include <string>
#include <map>
#include <iterator>
#include <set>
#include <queue>
#include <bitset>
#include <cassert>

using namespace std;


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