-Living Together-

 α asks X if he can borrow X’s ＼.

X answers that he does not mind it. 

But X adds he will need α’s ∠.

After this exchange,

α’s O and  ＼ became Q.

X’s ／ and ∠became △.

All in all,

One made Q and the other made △.

They are so different, but so, relevant.