import java.util.*;

class Trinangle
{
    public static void main(String[] args) 
    {
        Scanner sc = new Scanner(System.in);
        int a, b, c;
        System.out.println("Enter 3 angles:");
        a = sc.nextInt();
        b = sc.nextInt();
        c = sc.nextInt();
        if (a + b + c == 180) 
        {
            if (a < 90 && b < 90 && c < 90) 
            {
                System.out.println("Acute angled triangle");
            } 
            else if (a > 90 || b > 90 || c > 90) 
            {
                System.out.println("Obtuse angled triangle");
            } 
            else 
            {
                System.out.println("Right angled triangle");
            }
        } 
        else 
        {
            System.out.println("Cannot form a triangle");
        }
    }
}