Vocabulary consisting only from characters you are able to read
土日
どにち
weekend, Saturday and Sundaymix
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