3001. What characters can be added here so that each character contains a part of the previous character? a) 扇 -> _ -> _ -> 球 b) b) 早 -> _ -> _ -> 坪

a) 扇 -> 習 -> 皇 -> 球

扇 SEN, oogi - fan

習 SHUU, nara(u) - learn

皇 KOU, OU - emperor

球 KYUU, tama - ball, sphere

b) 早 -> 古 -> 吐 -> 坪

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

古 KO, furu(i) - old

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

坪 tsubo - unit of area