Verb conjugation of "coexistir" in Spanish

I ordered a cab at four o'clock in the morning which took me to the Central Bus Station. I was much to early because the bus would go just at seven o'clock. Anyway I was sitting there and listening to music.
We begin to talk about 'we' and 'they', which makes us partly discriminating. As a whole, I guess that all of us have some predispositions, but the difference is, that some know how to supress it.
On the way we met a nice village girl which tried to sell us some souvenirs. We told her that we would not buy from her. Her English was excellent, and we did not believe that she was twelve years old.