## Task 3 - 230623

The four students Erdbach, Freimuth, Giebler, and Hausmann have the first names Alfred, Bernd, Christian, and Detlef (possibly not in this order).

They met at Siegfried Zander's birthday party. The following is known:

(1) As the first guest, Siegfried could greet his classmate Hausmann, the second guest was Christian, and then Erdbach. Last to arrive was Bernd.

(2) Each of these four guests brought exactly one gift for the birthday person: Hausmann brought a dice game, Alfred a pen, Bernd a bouquet of roses, and Giebler a book.

Show that from these statements, the four birthday guests' first and last names can be uniquely determined!

Provide these matching first and last names!