import java.util.Scanner;

public class Main {
	public static void main(String[] args) {
		Scanner scan = new Scanner(System.in);
		String S = scan.nextLine();
		
		int ans = 0;
		for(int i=0; i<S.length(); i++) {
			if(S.charAt(i) == '…') {
				int count = 0;
				for(int j=i; j<S.length(); j++) {
					if(!(S.charAt(j) == '…')) {
						i=j+1;
						break;
					}
					count++;
				}
				ans = Math.max(ans, count);
			}
		}
		System.out.println(ans);
	}
}