Your task is to write a program which asks the user to input the name of a planet with the attribute name, and the program will show the value for this attribute

The density and gravity of each planet are:

Planet	Density (kg/m^3)	Gravity (m/s^2)
mercury	5429	3.7
venus	5243	8.9
earth	5514	9.8
mars	3934	3.7
jupiter	1326	23.1
saturn	687	9.0
uranus	1270	8.7
neptune	1638	11.0

In your code you shall define a dictionary constant containing the data in the above table, using the appropriate data types for keys and values. The dictionary must consist of planet data. The attribute in each planet must be represented in disctionary as well. Next, ask the user to input a planet name. If the planet name is in the dictionary, the program will ask the attribute name. If the attribute is in the planet's dictionary, the value of this attribute will be displayed. If the planet is recognised but the attribute is not recognised, display the message "Unrecognised Attribute". Otherwise, display the message "Unrecognised planet".

To be more user-friendly, you must also ignore the capitalisation of the input name when checking it (i.e. "mercury", "MERCURY", and "Mercury" are all accepted by the program).