Ключевые слова: 6, backdrop, background, beach, calendar, cipher, coast, coastline, color, concept, copyspace, cypher, detail, digit, education, figure, font, handwriting, holiday, learn, maths, natural, nature, nobody, number, numbers, numerical, ocean, pebble, pebbles, relax, rock, sand, sandy, sea, seashore, seaside, shape, shore, sign, six, stone, stones, summer, sun, symbol, teach, texture, vacation, water, write,