2918. What characters can be added here so that each character contains a part of the previous character? a) 婆 -> _ -> _ -> 堀 b) 誓 -> _ -> _ -> 飼

a) 婆 -> 如 -> 吐 -> 堀

婆 BA - old woman

如 JO, NYO - equal, like, as, as if

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

堀 hori - moat, canal, ditch

b) 誓 -> 詳 -> 養 -> 飼

誓 SEI, chika(u) - swear, pledge, vow

詳 SHOU, kuwa(shii) - detailed, full, familiar with

養 YOU, yashina(u) - rear, support, adopt

飼 SHI, ka(u) - raise, keep pets