Vocabulary consisting only from characters you are able to read
八日
youka
eight days, the eighth (day of the month)jlpt5, toki
十日
tooka
ten days, the tenth day of the monthjlpt5, toki
大して
taishite
(not so) much, (not) verymix
二十日
hatsuka
twenty days, twentieth day of the monthjlpt5, toki
水力
suiryoku
hydraulic power, water powermix