Vocabulary consisting only from characters you are able to read
万
まん
(num) 10,000, ten thousand, (adv) myriads, alljlpt5
億
おく
(num) 100,000,000, hundred millionjlpt4
一兆
いっちょう
1,000,000,000,000, one trillion, one billion (obs. British)mix
兆し
きざし
signs, omen, symptomsmix