1604. What characters can be added here so that each character contains a part of the previous character? a) 勅 -> _ -> _ -> 坂 b) 案 -> _ -> _ -> 肺

Answer:

a) 勅 -> 加 -> 吐 -> 坂

勅  CHOKU - imperial decree

加  KA, kuwa(eru), kuwa(waru) - add, append, join, take part

吐  TOU, ha(ku) - spew, vomit, give vent to

坂  HAN, saka - slope, hill

b) 案 -> 棋 -> 期 -> 肺

案  AN - plan, proposal

棋  KI - go, shogi, Japanese chess

期  KI, GO - time, period, term

肺  HAI - lung