Ключевые слова: abstract, backdrop, background, blank, cardboard, checkered, checkred, clean, close up, closeup, design, document, education, empty, frame, geometric, graph, graphic, grid, gridded, learning, letter, line, lined, lines, memo, note, notebook, notepad, notepaper, office, page, paper, pattern, scale, school, sheet, single, square, squared, striped, study, technical, texture, textured, university, wallpaper, white, write,