Ключевые слова: agriculture, america, american, background, banking, black, blank, cash, cents, change, coin, coins, convertible, copy, currency, dig, dollar, earn, economic, exchange, falling, fertile, finance, ground, grunge, heap, industry, inventory, investment, large, lie, many, metal, money, number, pile, profit, quarter, rendering, salary, silver, soil, space, success, surface, tool, treasure, usa, usd, wealth,