Inspired by [this xkcd](http://xkcd.com/851_make_it_better/)

[![enter image description here][1]][1]

You work for [Shazam](https://en.wikipedia.org/wiki/Shazam_(service)) and they have a project for you. Some customers are complaining about their app taking up too much space on their phone, so they want you to code a lite version of the app. Unfortunately, your existing code can only understand the word "na", and you have to ship soon. That's okay, we'll do the best with what we've got. 

# The Challenge

You must write a full program that takes a user input, or takes a command line argument, and print the title and artist of the song. Since we are trying to fix customers complaining about program size, your code must be as short as possible. The input will be a string consisting entirely of na's, with a single space between them. Lowercase/uppercase is arbitrary. This is considered a valid input: `Na Na nA na NA` This is an invalid input: `nah nah NA naNa banana` You must determine what song is playing and print it out in exactly this format:

    Song: <trackname>
    Artist: <artist>

If the input is *exactly* 8 na's, this matches two separate songs, so you must print both:

    Song: Batman Theme
    Artist: Neal Hefti

and

    Song: Na Na Hey Hey Kiss Him Goodbye
    Artist: Steam

If the input is *exactly* 10 na's, you must print:

    Song: Katamari Damacy
    Artist: Yuu Miyake

If the input is *exactly* 11 na's, you must print:

    Song: Hey Jude
    Artist: The Beatles

If the input is 12 or more na's, you must print

    Song: Land Of 1000 Dances
    Artist: Wilson Pickett

Lastly, if the input is invalid, there are less than 8 na's, or any of the words are not "na", your program fails to understand the music. So logically, there is only one other song that it could possibly be. You must print:

    Song: Africa
    Artist: Toto

As usual, standard loopholes apply, and the shortest answer in bytes wins.

  [1]: https://i.sstatic.net/AWTyS.png