Ключевые слова: 1, adult, arm, caucasian, caucasian ethnicity, communication, concept, count, countdown, counting, cut out, digit, education, female, finger, first, gesture, gesturing, group, hand, hand gesture, human, human hand, icon, index, isolated, isolated on white, language, number, one, one person, palm, part, person, set, showing, sign, signal, simplicity, single, skin, symbol, teaching, thumb, up, variation, white, white background, woman, wrist,