Vocabulary consisting only from characters you are able to read
緑の日
みどりのひ
(n) Greenery Day (national holiday; May 4)namae, toki
七日
なのか
seven days, the seventh day of the monthjlpt5, toki
水力
すいりょく
hydraulic power, water powermix
八日
ようか
eight days, the eighth (day of the month)jlpt5, toki