%AoH =(
	{
	   Identifier1 => Anumber,
	   IdNumber1   => 1100001,
	   Identifier2 => Bnumber,
	   IdNumber2   => 1000000,
	   Identifier3 => Cnumber,
	   IdNumber3   => 2222222
	}
	
	[... More ...]
       );

##</code><code>##

Anumber = 1, BNumber = 2, Cnumber = 3

Anumber = 1, BNumber = 4, Cnumber = 3  #Bnumber is different

##</code><code>##

Anumber = 1, BNumber = 2, Cnumber = 3

Cnumber = 3, DNumber = 4, Enumber = 5

Enumber = 5, Anumber = 2, <undef>	# harder to found
                                        # Anumber changes