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 , the three angles of a triangle.

#### Output

Output the triangle’s description, starting with one of `acute`

, `right`

, `obtuse`

, and ending
with one of `equilateral`

, `isosceles`

, `scalene`

.

#### Sample Input

`60 60 60`

#### Sample Output

`acute equilateral`

#### Sample Input

`100 40 40`

#### Sample Output

`obtuse isosceles`

#### Sample Input

`90 89 1`

#### Sample Output

`right scalene`

## Comments