import math


class Vector:

    def __init__(self, x_, y_):
        self.x = x_
        self.y = y_

    def __len__(self):
        return math.hypot(self.x, self.y)

    def __mul__(self, other):
        return self.x * other.x + self.y * other.y

    def __add__(self, other):
        return Vector(self.x + other.x, self.y + other.y)

    def angle(self, other):
        return math.acos(self * other / len(self) / len(other))


x1, y1 = map(int, input().split())
x2, y2 = map(int, input().split())
x3, y3 = map(int, input().split())
a = Vector(x1, y1)
b = Vector(x2, y2)
c = Vector(x3, y3)
a = len(a)
b = len(b)
c = len(c)
a, b, c = sorted([a, b, c])
if a ** 2 + b ** 2 == c ** 2:
    print('прямоугольный')
elif a ** 2 + b ** 2 < c ** 2:
    print('тупоугольный')
else:
    print('остроугольный')