import java.util.Scanner;

public class Main {
	private String str;

	public void setStr(String str){
		this.str = str;
	}

	public String getStr(){
		return str;
	}

	public void countNum(){
		int num = 0,ans = 0;
		for(int i = 0;i < this.str.length();i++){
			if(str.substring(i,i + 1).equals("…")) {
				num++;
			}else{
				ans = Math.max(num,ans);
				num = 0;
			}
		}
		System.out.println(ans);
	}

	public static void main(String[] args) {
		Scanner sc = new Scanner(System.in);
		Main m = new Main();
		m.setStr(sc.next());
		m.countNum();
	}
}