2365. What characters can be added here so that each character contains a part of the previous character? a) 針 -> _ -> _ -> 球 b) 翌 -> _ -> _ -> 召

a) 針 -> 古 -> 呈 -> 球  

針  SHIN, hari - needle

古  KO, furu(i) - old

呈  TEI - offer, present, exhibit

球  KYUU, tama - ball, sphere

b) 翌 -> 音 -> 昭 -> 召  

翌  YOKU - next, following

音  ON, IN, oto, ne - sound

昭  SHOU - bright, clear

召  SHOU, me(su) - summon, wear, take