Ключевые слова: abstract, background, barb, barbed, barbwire, barrier, blue, border, boundary, closed, criminal, danger, dangerous, day, fence, forbidden, frame, freedom, guard, horizontal, iron, jail, liberty, limit, mesh, metal, military, nobody, outdoor, pattern, prison, private, protection, punishment, razor, safety, security, sharp, silhouette, sky, spikes, spiral, steel, stone, wall, wire,