2655. What characters can be added here so that each character contains a part of the previous character? a) 翌 -> _ -> _ -> 睡 b) 計 -> _ -> _ -> 珠

a) 翌 -> 音 -> 冒 -> 睡  

翌  YOKU - next, following

音  ON, IN, oto, ne - sound

冒  BOU , oka(su) - risk, brave, deft, dare, desecrate

睡  SUI - sleep

b) 計 -> 古 -> 呈 -> 珠  

計  KEI, haka(ru), haka(rau) - plan, total, measure

古  KO, furu(i) - old

呈  TEI - offer, present, exhibit

珠  SHU - pearl