Ключевые слова: architecture, bare, box, building, business, colorless, confidential, corridor, courier, deliver, detail, drop, education, furniture, gray, hallway, hole, insert, interior, internal, keyhole, letter, line, lock, locker, mail, mailbox, monochromatic, number, office, paper, perspective, post, private, professor, public, red, room, row, school, slot, sort, stark, wall, white,