Ключевые слова: adult, anxiety, awake, bed, bedroom, blanket, blue, caucasian, dark, darkness, depressed, depression, discomfort, disorder, dusk, elderly, exhausted, fatigue, gloomy, halflight, health, idea, insomnia, insomniac, lying, male, man, mustache, nervous, night, nightmare, person, philosopher, pillow, problem, sad, sleep, sleepless, stress, sullen, think, thinker, tired, trouble, twilight, upset, window, worry,