Vocabulary consisting only from characters you are able to read
山
jama
mountain, pile, heap, climax, critical pointjlpt5, shizen
二人
futari
two persons, two people, pair, couplejlpt5
十日
tooka
ten days, the tenth day of the monthjlpt5, toki
二十日
hacuka
twenty days, twentieth day of the monthjlpt5, toki