2802. What characters can be added here so that each character contains a part of the previous character? a) 章 -> _ -> _ -> 坪 b) 要 -> _ -> _ -> 念

a) 章 -> 古 -> 吐 -> 坪

章 SHOU - chapter, badge, mark

古 KO, furu(i) - old

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

坪 tsubo - unit of area

b) 要 -> 如 -> 吟 -> 念

要 YOU, i(ru) - essential(s) need

如 JO, NYO - equal, like, as, as if

吟 GIN - sing, chant, recite

念 NEN - thought, concern