#include <bits/stdc++.h>

using namespace std;
typedef long long ll;


int main(){
    int c, w;
    c = w = 0;
    string s;
    cin >> s;
    for (auto t : s){
        if (t == 'c')
            c++;
        else
            w++;
    }
    c--;
    cout << min(c, w) << endl;
    return 0;
}