Problem

Triangles can be described in many ways. One way to describe a triangle is by the equality between its angles/sides (equilateral, isosceles, scalene). Another way to describe a triangle is by the size of its largest angle (acute, right, obtuse).

These two descriptions can be combined as well! So a triangle with all three angles equaling 60 degrees is an acute equilateral triangle, and a triangle with one 100 degree angle and two 40 degree angles is an obtuse isosceles triangle.

Your job is to write a program that will describe a triangle given the size of its angles.

Input

Each test case contains three integers $A, B, C (1 \leq A, B, C \leq 178)$, the three angles of a triangle.

Output

Output the triangle’s description, starting with one of acute, right, or obtuse, and ending with one of equilateral, isosceles, or scalene.

Sample Input 1

60 60 60

Sample Output 1

acute equilateral

Sample Input 2

100 40 40

Sample Output 2

obtuse isosceles

Sample Input 3

90 89 1

Sample Output 3

right scalene

Editorial

not here yet