3022. What characters can be added here so that each character contains a part of the previous character? a) 婆 -> _ -> _ -> 坊 b) 柔 -> _ -> _ -> 砂

a) 婆 -> 如 -> 吐 -> 坊

婆 BA - old woman

如 JO, NYO - equal, like, as, as if

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

坊 BOU, BO - priest's residence, priest, boy

b) 柔 -> 棋 -> 碁 -> 碑

柔 JUU, NYUU, yawa(rakai) - soft

棋 KI - go, shogi, Japanese chess

碁 GO - go (board game)

砂 SA, SHA, suna - sand