Ключевые слова: advice, assessment, background, balance, blackboard, business, character, cheerful, child, choice, concept, customer, depressed, depression, drawing, education, emoticon, emotion, emotional, expression, feedback, feeling, feet, funny, happiness, happy, icon, idea, improvement, message, mood, negative, plan, positive, positivity, psychology, road, sad, sadness, satisfaction, shoes, sign, smile, smiley, sticky, survey, symbol, teen, unhappy, work,