// J. Singh
// 12/09/05
// Tomball H.S.
// Tomball,Tx 77277
// ACSL JR

import java.io.*;
public class ACSLSingh
{
	public static void main(String[] args)throws IOException
	{
		BufferedReader input = new BufferedReader(new InputStreamReader(System.in));
		
		double length;
		double height;
		double thick;
		
	for (int k = 1; k <= 5; k++)
		{		
		System.out.println(k + ". ");
			
		System.out.print("Enter Mail Length: ");
		length = Double.parseDouble(input.readLine());
		
		System.out.print("Enter Mail Height: ");
		height = Double.parseDouble(input.readLine());
		
		System.out.print("Enter Mail Thickness: ");
		thick = Double.parseDouble(input.readLine());
		
		double perimeter = thick + thick + height + height;
		
		if ((length >= 3.5) && (length <= 4.25) && (height >= 3.5) 
			&& (height <= 6) && (thick >= .007) && (thick <= .016))
			{
				System.out.println();
				System.out.println("REGULAR POST CARD");
				System.out.println();
			}
		else if ((length >= 4.25) && (length <= 6) && (height >= 5) 
			&& (height <= 11.5) && (thick >= .007) && (thick <= .016))
			{	
				System.out.println();
				System.out.println("LARGE POST CARD");
				System.out.println();
			}
		else if ((length >= 3.5) && (length <= 6.125) && (height >= 6) 
			&& (height <= 11.5) && (thick >= .016) && (thick <= .25))
			{
				System.out.println();
				System.out.println("ENVELOPE");
				System.out.println();
			}
		else if ((length >= 6.125) && (length <= 24) && (height >= 11) 
			&& (height <= 18) && (thick >= .25) && (thick <= .5))
			{
			
				System.out.println();
				System.out.println("LARGE ENVELOPE");
				System.out.println();
			}
		else if ((length >= 24) && (height >= 18) && (thick >= .5) 
			&& ((length + perimeter) <=84))  
			{
				System.out.println();
				System.out.println("PACKAGE");
				System.out.println();
			}
		else if ((length + perimeter > 84) && (length + perimeter <= 130))
			{
				System.out.println();
				System.out.println("LARGE PACKAGE");
				System.out.println();
			}
		else
			{
			
				System.out.println();
				System.out.println("UNMAILABLE");
				System.out.println();
			}
			
		}
	}