## Description

Enter the three sides of a triangle, first determine whether they can form a triangle, and then identify the type of triangle (equilateral?, isosceles?, general?).

## Input Format

If the sides cannot form a triangle, output `no`.  
For an equilateral triangle, output `db`.  
For an isosceles triangle, output `dy`.  
For a general triangle, output `yb`.

## Output Format

Output one line: whether it is not a triangle or the type of the triangle.

1 1 1

db

Hint

Conditions for determining a triangle: The sum of any two sides must be greater than the third side, and the difference of any two sides must be less than the third side.

Source

CodesOnline