import java.util.Scanner;


public class Main_yukicoder341 {

    public static void main(String[] args) {
        Scanner sc = new Scanner(System.in);

        char[] s = sc.next().toCharArray();

        int max = 0;
        int len = 0;
        for (int i = 0; i < s.length; i++) {
        	if (s[i] == '…') {
        		len++;
        		max = Math.max(max, len);
        	} else {
        		len = 0;
        	}
        }

        System.out.println(max);

        sc.close();
    }
}