Ключевые слова: 21, act, adolescence, adult, age, alcohol, background, birthday, character, concept, consume, copy, digits, drinking, figure, grey, isolated, legal, majority, minimum, number, numbers, numeral, paint, painted, pavement, sign, space, states, stencil, street, surface, symbol, symbolic, text, texture, twentyone, two, voting, white, youth, zero,