Find all rooms that are unoccupied on both the night of March 20, 2010 and every night during the date range March 12, 2010 through March 14, 2010 (inclusive). List room code and room name, sort by room code A-Z.

Rooms: RoomId : a three-letter unique Id code of a room roomName : official name of the room beds : number of beds in the room bedType : type of the bed(s) in the room. All beds in each room are of the same type. maxOccupancy : maximum number of people allowed to stay in the room basePrice : base price (in US dollars) of one night of stay in the room. decor : decoration style of the room

Reservations Code : reservation code Room : the three-letter room code (see Rooms.RoomId) CheckIn : date of check-in/arrival CheckOut : date of check-out/departure Rate : actual nightly rate. Each night of stay on one reservation always costs the same amount, although rates may vary for the same room from one reservation to another LastName : last name of the person who made the reservation FirstName : first name of the person who made the reservation Adults : number of adults (18 and above) staying in the room. Each reservation must have at least one adult Kids : number of kids (ages 0-17) staying in the room.

EXPECTED:

HBB	Harbinger but bequest
IBD	Immutable before decorum
MWC	Mendicant with cryptic
TAA	Thrift and accolade

Please explain