1989. What characters can be added here so that each character contains a part of the previous character? a) 章 -> _ -> _ -> 賜 b) 炎 -> _ -> _ -> 坪

a) 章 -> 古 -> 員 -> 賜  

章  SHOU - chapter, badge, mark

古  KO, furu(i) - old

員  IN - member

賜  SHI, tamawa(ru) - grant, bestow, confer

b) 炎 -> 畑 -> 里 -> 坪  

炎  EN, honou - flame

畑  hatake - cultivated field

里  RI, sato - village

坪  tsubo - unit of area