import java.io.BufferedReader;
import java.io.InputStreamReader;

public class Main {
	public static void main(String args[] ) throws Exception {
		BufferedReader br = new BufferedReader(new InputStreamReader(System.in));
		String line = br.readLine();
		int max = 0;
		boolean ten = false;
		int cnt = 0;
		for (int i = 0; i <= line.length(); i++) {
			if (i != line.length() && line.charAt(i) == '…') {
				ten = true;
				cnt++;
			} else {
				if (ten) {
					if (max < cnt) {
						max = cnt;
					}
					cnt = 0;
					ten = false;
				}
			}
		}
		System.out.println(max);
	}
}