Vocabulary consisting only from characters you are able to read
七日
なのか
seven days, the seventh day of the monthjlpt5, toki
八日
ようか
eight days, the eighth (day of the month)jlpt5, toki
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
鼠
ねずみ
(1)mouse, rat, (2)dark gray, dark grey, slate (color, colour); (3)mouse, rat, (4)dark gray, dark grey, slate (color, colour) doubutsu