2386. What characters can be added here so that each character contains a part of the previous character? a) 警 -> _ -> _ -> 味 b) 架 -> _ -> _ -> 臓

a) 警 -> 計 -> 古 -> 味  

警  KEI - admonish, warn

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

古  KO, furu(i) - old

味  MI, aji , aji(wau) - taste

b) 架 -> 棋 -> 期 -> 臓  

架  KA, ka(keru), ka(karu) - hang, build (a bridge)

棋  KI - go, shogi, Japanese chess

期  KI, GO - time, period, term

臓  ZOU - internal organ