#include <bits/stdc++.h>
typedef long long ll;
#define INF 1000000000
#define MOD 1000000007
using namespace std;
int main(void){
    string s;
    cin>>s;
    int num_c=0,num_w;
    for(int i=0;i<s.size();i++){
        if(s[i]=='c')num_c++;
        else {
            break;
        }
    }
    num_w=s.size()-num_c;
    cout<<min(num_c-1,num_w)<<endl;
}