import java.util.*;

public class Main {
    public static void main(String[] args) {
        Scanner scanner = new Scanner(System.in);
        String text = scanner.next();

        int length = - 1;
        boolean c = false;
        boolean w1 = false;
        int start = 0;
        for (int i = 0; i < text.length(); i++) {
            if (text.charAt(i) == 'c') {
                start = i;
                c = true;
            } else if (text.charAt(i) == 'w' && c) {
                if (!w1) {
                    w1 = true;
                } else {
                    int tmpLength = i - start + 1;
                    if (length < tmpLength) {
                        length = tmpLength;
                    }
                    start = 0;
                    c = w1 = false;
                }
            }
        }
        System.out.println(length);
    }
}