import java.util.*;

public class lineup {

	public static void main(String[] args) {

		Scanner stdin = new Scanner(System.in);
		int n = stdin.nextInt();
		String[] list = new String[n];
		String[] sorted = new String[n];
		for (int i=0; i<n; i++) {
			String name = stdin.next();
			list[i] = name;
			sorted[i] = name;
		}
		Arrays.sort(sorted);

		boolean up = true;
		for (int i=0; i<n; i++)
			if (sorted[i].compareTo(list[i]) != 0)
				up = false;

		boolean down = true;
		for (int i=0; i<n; i++)
			if (sorted[n-1-i].compareTo(list[i]) != 0)
				down = false;

		if (up) System.out.println("INCREASING");
		else if (down) System.out.println("DECREASING");
		else	System.out.println("NEITHER");
	}
}