Ключевые слова: abstract, alarm, asleep, balloon, bed, bedtime, black, bubble, clipart, cloud, comic, concept, contour, doodle, dream, drowsiness, flat, glyph, goodnight, icon, illustration, insomnia, isolated, line, linear, nap, outline, relax, sign, simple, sleep, sleepy, snooze, snore, sound, speech, standby, strip, stroke, sweet, symbol, text, thin, time, web, z, zzz, zzzz,