import java.util.*;

class Main {
        public static void main(String args[]) {
                try (Scanner sc = new Scanner(System.in)) {
                        String S = sc.next();
                        int c = 0, w = 0;
                        for (int i = 0; i < S.length(); i++) {
                                if (S.charAt(i) == 'c') {
                                        c++;
                                } else {
                                        w++;
                                }
                        }
                        System.out.println(Math.max(0, Math.min(c - 1, w)));
                }
        }
}