Brenda, Pamela, Alice and Kitty go into a shop.
One girl buys a pen and a pencil.
One girl buys a pen and a book.
One girl buys a pencil and a book.
One girl buys two pencils.
Brenda buys a pen and one other thing.
Pamela buys a book and one other thing.
Alice doesn't buy a book or a pen.
Kitty doesn't buy a pen. She buys a book() and a pencil(). [Tipp: Bei der Lösung bitte die ABC-Reihenfolge beachten!]