//CS5-HMC-Sp.,00-HW5-2
//A. Khakpour, Fall 98

import java.io.*;

class Trng
{
   private static Triangle m = new Triangle();

   public static void main (String[] args) throws IOException
   {
      BufferedReader stdin = new BufferedReader
         (new InputStreamReader(System.in));

      System.out.println ("Enter side 1:");
      int side1 = Integer.parseInt (stdin.readLine());
      System.out.println ("Enter side 2:");
      int side2 = Integer.parseInt (stdin.readLine());
      System.out.println ("Enter side 3:");
      int side3 = Integer.parseInt (stdin.readLine());


      if (m.is_right(side1, side2, side3)) 
         System.out.println ("It is a right triangle.");

      if (m.is_scalene(side1, side2, side3))  
         System.out.println ("It is a scalene triangle.");

      if (m.is_isosceles(side1, side2, side3)) 
        System.out.println ("It is an isosceles triangle.");

      if (m.is_equilateral(side1, side2, side3))  
         System.out.println ("It is an equilateral triangle.");   
   }
}

class Triangle
{
   public boolean is_right (int a, int b, int c)
   {
      boolean success = false;
      if (a*a == b*b+c*c || b*b == c*c+a*a || c*c == a*a+b*b)
         success = true;
      return success;
   }
   public boolean is_scalene (int a, int b, int c)
   {
      boolean success = false;
      if (a != b && b != c && c != a)
         success = true;
      return success;     
   }
   public boolean is_isosceles (int a, int b, int c)
   {
      boolean success = false;
      if (a == b || b == c || c == a)
         success = true;
      return success;   
   }
   public boolean is_equilateral (int a, int b, int c)
   {
      boolean success = false;
      if (a == b && b == c)
         success = true;
      return success;
   }
}