REALLY couldn't hear that last word, "bolo". I laughed because it sounded like gibberish. Sorry.
Impossible to understand, sounds like vlavlo no way could I make it into bolo not even when listening anew once I knew what the reply should be.
Chegar is to arrive, where as vir is to come. The first would be when they got to the destination, where as the former is when they are on their way.
Im relating this to spanish,but I think that "chega" its when somebody is already in the place, while "vem" its when they're on their way to the place.
Needs to be more clear on that last word. Couldn't understand it at all.