import java.util.*; import java.io.*; // 注意类名必须为 Main, 不要有任何 package xxx 信息 public class Main { public static void main(String[] args) throws IOException { Scanner in = new Scanner(System.in); // 注意 hasNext 和 hasNextLine 的区别 while (in.hasNext()) { // 注意 while 处理多个 case String str = in.nextLine(); int n = Integer.parseInt(str); String[] s = new String[n]; for(int i = 0 ; i < n; i++) { s[i] = in.nextLine(); } if(isOrderIex(s) && isOrderLen(s)) { System.out.println("both"); } else if(isOrderIex(s)) { System.out.println("lexicographically"); } else if(isOrderLen(s)) { System.out.println("lengths"); } else { System.out.println("none"); } } } public static boolean isOrderIex(String[] s) { for(int i = 0 ; i < s.length-1; i++) { if(s[i].compareTo(s[i+1]) > 0) { return false; } } return true; } public static boolean isOrderLen(String[] s) { for(int i = 0 ; i < s.length-1; i++) { if(s[i].length() > s[i+1].length()) { return false; } } return true; } }