Two people + two writes = Stories
Which you subtract from the two people, which leave you with,
Two authors writing stories. 
Because lets face it, if I didn't subtract the two people, that would leave us with four, and there isn't four of us, there is only two, and having four would be a lot. Plus, authors are people too right? And I already added Math into the equation, and English, so all we are missing is History, Geo and ect.
Anywho follow up for some more!