Volume Covered must be a positive integer.
Electricity Used must be a positive integer.
Invalid command
Invalid command
Manufacturer's name must be at least 4 symbols long.
Air Conditioner model XZ570 from BlackBird registered successfully.
Model's name must be at least 2 symbols long.
Electricity Used must be a positive integer.
Volume Covered must be a positive integer.
Air Conditioner model  P320  from  Hitachi  registered successfully.
An entry for the given model already exists.
The specified entry does not exist.
Air Conditioner model  P320  from  Hitachi  tested successfully.
