Claire, Katia and Lila like to have dinner together.
Each of them always orders either coffee or tea after dinner.
If Claire orders coffee, then Katia orders the drink that Lila orders.
If Katia orders coffee, then Claire orders the drink that Lila doesn't order.
If Lila orders tea, then Claire orders the drink that Katia orders.
According to these constraints, which of them must always order the same drink?