Vocabulary consisting only from characters you are able to read
白黒
しろくろ
(1)black and white, monochrome, (exp,vs) (2)good and evil, right and wrong, guilt and innocence iro
黄金
おうごん
gold; (n,adj-no) gold; (n,adj-no) gold; goldmix
億
おく
(num) 100,000,000, hundred millionjlpt4