text: Zack: are you sure the exam is next week?
  Theo: pretty sure, why?
  Zack: I don't know
  Zack: I was under the impression that our professor is on leave until the end of the month
  Theo: maybe someone else will do it
  Theo: I don't think they need him for a written exam
  Zack: you might be right
  Zack: but that means that we don't have much time left to study for it
  Theo: don't worry
  Theo: from what I heard it's not that difficult
  Zack: who told you that?
  Theo: my sister's friend took it last year
  Theo: and she claims it was one of the easiest one
  Zack: maybe for her
  Zack: I'm still not confident about it
  Theo: we'll see
  Theo: there's no point in speculating
  Theo: or worrying in advance
target: Zack and Theo are taking the exam next week.