Vocabulary consisting only from characters you are able to read
山
yama
mountain, pile, heap, climax, critical pointjlpt5, shizen
五日
itsuka
five days, the fifth day (of the month)jlpt5, toki
二人
futari
two persons, two people, pair, couplejlpt5
水力
suiryoku
hydraulic power, water powermix
三日
mikka
three days, the third day of the monthjlpt5, toki