import java.util.ArrayList;
import java.util.Scanner;


public class TextRoll_Calvin {
	public static void main(String[] args) {
		Scanner in = new Scanner(System.in);
		while(in.hasNextLine()) {
			int n = Integer.parseInt(in.nextLine());
			if (n == 0) {
				break;
			}
			ArrayList<String> text = new ArrayList<String>();
			for (int i = 0; i < n; ++i) {
				String _t = in.nextLine();
				text.add(_t);				
			}
			int pointer = 1;
			result:
			for (int i = 0; i < text.size(); ++i) {
				String t = text.get(i);
				for (int j = pointer; j < t.length(); ++j) {
					if (t.charAt(j) == ' ') {
						continue result;
					}
					else {
						++pointer;
					}
				}
			}
			System.out.println(pointer);
		}
		in.close();
	}
}