import java.util.Scanner;

public class Main {
    public static void main(String[] args) {
        Scanner sc = new Scanner(System.in);
        float h = sc.nextFloat();
        float w = sc.nextFloat();
        float t = w / h / h;
        if (t < 18) 
            System.out.print("underweight");
        else if (t >= 18 && t < 25)
            System.out.print("normal");
        else if (t >= 25 && t < 27)
            System.out.print("overweight");
        else 
            System.out.print("obese");
    }
}