Задача Задача №51538
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- Whose book does he have that is very interesting, if not his friend's?
- If it's not his friend's, whose interesting book does he have?
- Whose interesting book does he have, if it's not his friend's?
- Who does he have a very interesting book from, if not his friend?
- If it's not his friend's, whose book does he have that is very interesting?
