Title: Необов'язково

Text: Thirty spokes share the wheel's hub, it is the center hole that makes it useful, shapes clay into a vessel. It is the space within that makes it useful. Cut doors and windows for a room, it is the holes which make it useful. Therefore profit comes from what is there, usefulness from what is not there. Кожен абзац буде тестом.

Save test: Використовуйте це, якщо ви хочете поділитися цим тестом на друкування (тільки для автентифікованих користувачів).