Situation: I am getting a book from the bookshelf, while having a ball on my right.
Alternative situations: I am placing my keys on top of the bookshelf in front of me so I do not lose them again. I am going to take a nap on the couch that is on my 4 o'clock. I found a book on the bookshelf in front of me.
Question: How many pillows are behind me on a couch on the right?