993. What character can be added to both of these characters to give other characters? 馬_ -> _鳥

Answer:

馬  BA, uma, ma  - horse

鳥  CHOU, tori - bird 

Add 区:馬+区 区+鳥 

区  KU - district

駆  KU, kake(ru), ka(ru) - gallop, run, rush, drive, spur on

鴎  kamome - seagull