2928. What characters can be added here so that each character contains a part of the previous character? a) 訟 -> _ -> _ -> 意 b) 早 -> _ -> _ -> 念

a) 訟 -> 翁 -> 翌 -> 意

訟 SHOU - accuse

翁 OU, okina - old man

翌 YOKU - next, following

意 I - will, heart

b) 早 -> 古 -> 吟 -> 念

早 SOU, SA, haya(i) , haya(meru) - early, fast, hasten

古 KO, furu(i) - old

吟 GIN - sing, chant, recite

念 NEN - thought, concern