Dada, and also Sepulchers and Sepulchers)

Indeed, it is so in the work itself. But do not despair! The author gave an additional explanation, from which everything becomes clear:
As I have already explained many times, the seals are very similar to the turquoise, and their colour range resembles soft strawberries. Of course, their practical function is different, but I think you, as an adult, do not need to explain it.
by S. Lem