import java.util.*;

public class Main {
	public static void main(String[] args) {
		Scanner sc = new Scanner(System.in);
		
		String S = sc.next();
		
		char[] charS = S.toCharArray();
		
		int cnt = 0, max = 0;
		
		for(int i = 0; i < S.length(); i++) {
			if(charS[i] == '…') {
				cnt++;
			} else {
				if(cnt > max) {
					max = cnt;
				}
				
				cnt = 0;
			}
		}
		
		if(cnt > max) {
			max = cnt;
		}
		
		System.out.println(max);
	}
}