import java.util.Scanner;

public class Main {
	public static void main(String[] args){
		Scanner sc = new Scanner(System.in);
		String s = sc.nextLine();
		int l = 0;
		int maxi = -1;
		for(int i = 0;i < s.length();i++){
				if(s.charAt(i) == '…'){
					l++;
				}else{
					if(maxi < l){
						maxi = l;
					}
					l = 0;
				}
		}
		if(maxi < l){
			maxi = l;
		}
		System.out.println(maxi);
	}
}