やまの かわ
yama no kawa
mountain river
かわ
か わ
ka wa
か you already have. わ is new.
Your Hiragana
わ joins because かわ needed it. 28 of 46 is not unfinished work.
You have not learned everything here. You are not meant to. See what you recognize.
山の川が 石を越え
You can already see some of it.