//Package PS1
import javax.swing.JOptionPane;

public class Triangle
{
    public static void main(String args[])
    {
        //ask user to enter three positive integers
        int a = Integer.parseInt(JOptionPane.showInputDialog("Enter the length of the first edge:"));
        int b = Integer.parseInt(JOptionPane.showInputDialog("Enter the length of the second edge:"));
        int c = Integer.parseInt(JOptionPane.showInputDialog("Enter the length of the third edge:"));
        int max = Math.max(a, Math.max(b, c));
        if((max==a && a*a==b*b+c*c)||(max==b && b*b==a*a+c*c)||(max==c && c*c==a*a+b*b))
            System.out.println("Great, they can make a perpendicular triangle!");
            //JOptionPane.showMessageDialog(null,"Great, they can make a perpendicular triangle");
        else
            System.out.println("Sorry, they can't make a perpendicular triangle.");
            //JOptionPane.showMessageDialog(null,"Sorry, they can't make a perpendicular triangle");
        System.exit(0);
    }
}