import java.util.Scanner;

class main{
    public static void main(String args[]){
	Scanner scan = new Scanner(System.in);
	int count = 0;
	int max = 0;
	String str = scan.next();

	for(int i = 0; i < str.length(); i++){
	    char ch = str.charAt(i);
	    if(ch == '…'){
		count++;
	    }
	    else{
	        max = Math.max(count, max);
		count = 0;
	    }
	}

	max = Math.max(count, max);

	System.out.println(max);

    }
}