nums = list(map(int, input("").split(" ")))
srtd = nume.sort()
a, b, c = srtd[0], srtd[1], srtd[2]
def R_O_A_judge(a,b,c):
if a2 + b2 > c2:
return "Acute triangle"
elif a2 + b2 == c2:
return "Right triangle"
else:
return "Obtuse triangle"
def I_E_judge(a,b,c):
if a == b and b == c:
return "Equilateral triangle"
elif a == b or b == c or a == c:
return "Isosceles triangle"
if a+b>c and a+c>b and b+c>a:
print(R_O_A_judge(a,b,c))
print(I_E_judge(a,b,c))
else:
print("Not triangle")
