Vocabulary consisting only from characters you are able to read
十億
じゅうおく
1,000,000,000, billion (American), (obs) milliard (British)mix
億
おく
(num) 100,000,000, hundred millionjlpt4
百万
ひゃくまん
(1)1,000,000, one million, million, (2)many mix
兆し
きざし
signs, omen, symptomsmix