2023. What characters can be added here so that each character contains a part of the previous character? a) 粒 -> _ -> _ -> 距 b) 炎 -> _ -> _ -> 繕

a) 粒 -> 音 -> 明 -> 距  

粒  RYUU, tsubu - a grain

音  ON, IN, oto, ne - sound

明  MEI, MYOU, aka(rui), a(keru) - bright

距  KYO - distance

b) 炎 -> 畑 -> 累 -> 繕  

炎  EN, honou - flame

畑  hatake - cultivated field

累  RUI - involvement, trouble, accumulation

繕  ZEN, tsukuro(u) - repair, mend