A certain Oxford professor, assigned to espionage cryptography services British, role played by Dirk Bogarde in a film, recruits his proposing small attention exercises, such as mentally reading a word the other way around. Frequently he does it with his own name: SEBASTIAN, what will there be to read NAITSABES.
He wonders if there is any movement of the plane or of space that transforms one of these words in the other, just as they appear written. And if it had been called AVITO, like a certain Unamuno character? Give a reasoned explanation for each answer. combinatoricsgeometric transformation