d = input().split()


a = int(d[0])
b = int(d[1])
c = int(d[2])
d = [a,b,c]
d.sort()


if a+b<=c or a+c<=b or b+c<=a:
    print("Not triangle")
else:
    if a**2+b**2==c**2:
        print("Right triangle")

    if a**2+b**2>c**2:
        print("Acute triangle")
    if a**2+b**2<c**2:
        print("Obtuse triangle")
    if a==b or b==c or c==a:
        print("Isosceles triangle")
    if a==b and a==c and c==b:
        print("Equilateral triangle")