789. What character can be added to both of these characters to give other characters? 山_ -> _包


Answer:

山  SAN, yama - mountain

包  HOU, tsutsu(mu) - wrap

Add 石:山+石 石+包 

石  SEKI, SHAKU, ishi - stone

岩  GAN, iwa - rock

砲  HOU - gun, cannon