import java.util.*;

class Triangle2 
{
    public static void main(String[] args) 
    {
        Scanner sc = new Scanner(System.in);
        int a, b, c;
        System.out.println("Enter 3 sides:");
        a = sc.nextInt();
        b = sc.nextInt();
        c = sc.nextInt();
        if (a < b + c && b < a + c && c < a + b) 
        {
            if (a * a < b * b + c * c && b * b < a * a + c * c && c * c < a * a + b * b) 
            {
                System.out.println("Acute angled triangle");
            }
            else if (a * a > b * b + c * c || b * b > a * a + c * c || c * c > a * a + b * b) 
            {
                System.out.println("Obtuse angled triangle");
            }
            else
            {
                System.out.println("Right angled triangle");
            }
        } 
        else 
        {
            System.out.println("Cannot form a triangle");
        }
    }
}