1956. What characters can be added here so that each character contains a part of the previous character? a) 針 -> _ -> _ -> 坂 b) 翌 -> _ -> _ -> 肺

a) 針 -> 古 -> 吐 -> 坂  

針  SHIN, hari - needle

古  KO, furu(i) - old

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

坂  HAN, saka - slope, hill

b) 翌 -> 音 -> 明 -> 肺  

翌  YOKU - next, following

音  ON, IN, oto, ne - sound

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

肺  HAI - lung