Ключевые слова: 1, 2, 3, 4, 5, action, adult, back, background, black, calculate, child, computer, count, couple, double click, dragging, female, fifth, finger, first, fist, flick, forefinger, four, fourth, gesture, girl, hand, hand sign, hold, human hand, isolated, man, math, ok, people, second, sign, smart phone, tapping, technology, third, three, thumb, turning, victory, white, woman, zoom,