He lost everything.

My boyfriend gave me a gift.

Everyone was surprised by the news.

There is nothing in his room.

Please stop making unreasonable demands.

He is spending money unreasonably.

I apologize for not contacting you for a long time.

This programming language is said to be Turing complete.

His performance was perfect and without blemish.

In mathematics, a perfect number refers to a number where the sum of its divisors, excluding the number itself, equals the number.