#include <bits/stdc++.h>
using namespace std;
typedef long long ll;

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