Original element is 0
Original element is 1
Original element is 2
Original element is 3
Original element is 4
Original element is 5
Original element is 6
Original element is 7
Original element is 8
Original element is 9
Going backwards element is 0
Going backwards element is 19
Going backwards element is 18
Going backwards element is 17
Going backwards element is 16
Going backwards element is 15
Going backwards element is 14
Going backwards element is 13
Going backwards element is 12
Going backwards element is 11
Second time around 
Element is 10
Element is 21
Element is 22
Element is 23
Element is 24
Element is 25
Element is 26
Element is 27
Element is 28
Element is 29
Reverse iterator element is 29
Reverse iterator element is 28
Reverse iterator element is 27
Reverse iterator element is 26
Reverse iterator element is 25
Reverse iterator element is 24
Reverse iterator element is 23
Reverse iterator element is 22
Reverse iterator element is 21
Reverse iterator element is 10
----------- PART 2 -----------
Let's try to print it
Land={Property={id=0, price=200000}, lot_size=10000, water=0}
House={Land={Property={id=1, price=600000}, lot_size=10001, water=0}, size=2000}
Land={Property={id=2, price=200001}, lot_size=10002, water=0}
House={Land={Property={id=3, price=600001}, lot_size=10003, water=0}, size=2001}


Content of the list is 
Land={Property={id=0, price=200000}, lot_size=10000, water=0}
House={Land={Property={id=1, price=600000}, lot_size=10001, water=0}, size=2000}
Land={Property={id=2, price=200001}, lot_size=10002, water=0}
House={Land={Property={id=3, price=600001}, lot_size=10003, water=0}, size=2001}


Content of the reversed list is 
House={Land={Property={id=3, price=600001}, lot_size=10003, water=0}, size=2001}
Land={Property={id=2, price=200001}, lot_size=10002, water=0}
House={Land={Property={id=1, price=600000}, lot_size=10001, water=0}, size=2000}
Land={Property={id=0, price=200000}, lot_size=10000, water=0}


Content of the sorted list is 
Land={Property={id=0, price=200000}, lot_size=10000, water=0}
Land={Property={id=2, price=200001}, lot_size=10002, water=0}
House={Land={Property={id=1, price=600000}, lot_size=10001, water=0}, size=2000}
House={Land={Property={id=3, price=600001}, lot_size=10003, water=0}, size=2001}