#include <bits/stdc++.h>
#define FOR(i,a,b) for(int i=(a);i<(b);i++)
#define REP(i,n) FOR(i,0,n)
#define rep(i,n) FOR(i,0,n)
#define each(e,v) for(auto&& e:(v))
#define DEBUG(x) cout<<#x<<": "<<x<<endl
using namespace std;
using vint = vector<int>;
using vdouble = vector<double>;
using vstring = vector<string>;

int main() {
    string s; cin >> s;
    int cnt = 0;
    each(c, s) {
        if(c == 'c') cnt++;
        else break;
    }
    int wnt = s.size() - cnt;
    if(cnt <= wnt) {
        cout << cnt - 1 << endl;
    } else {
        cout << wnt << endl;
    }
    return 0;
}