判断三角形

题目描述

This is an easy problem, just for you to warm up.
Give you three edges of a triangle. Can you tell me which kind of triangle it stands for?
If it’s not a triangle,pleaese output “wrong”,If it’s a right triangle(直角三角形), please output “good”. If it’s a isosceles triangle(等腰三角形), please output “perfect”. Otherwise, please output “just a triangle”. You may suppose the input is legal.

输入

There are many cases.
The each case contains three integers a, b, c in a line which stands for the length of the three edges. (0 <a, b, c < 300).

输出

For each case, output the answer in one line.

输入样例

3 4 5
2 2 3 
1 4 4
4 6 3
1 2 3

输出样例

good
perfect
perfect
just a triangle
wrong

PS

三个整数并不能组成等腰直角三角形= =