import java.util.Scanner;

class Main {
    public static final char dots = '…';
    public static void main(String[] args) throws Exception {
        Scanner in = new Scanner(System.in);
        String s = in.next();
        int max = 0;
        int len = 0;
        for(int i=0; i<s.length(); i++) {
            char c = s.charAt(i);
            if(c == dots) {
                len++;
                max = Math.max(max, len);
            } else {
                len = 0;
            }
        }
        System.out.println(max);
    }
}