Situation: I am sitting on the desk and there is a tray behind me.
Alternative situations: I just grab the print out on printer behind me, now heading towards the photocopier to my left in front of me to make 100 copies. Leaning against the desk behind me, I am trying to move the heavy office chair in front of me, while the printer in my four o'clock direction is out of paper.
Question: How many bulletin boards are on the wall to my 3 o'clock?