2562. What characters can be added here so that each character contains a part of the previous character? a) 動 -> _ -> _ -> 財 b) 弦 -> _ -> _ -> 結

a) 動 -> 加 -> 員 -> 財  

動  DOU , ugo(ku) - move

加  KA, kuwa(eru), kuwa(waru) - add, append, join, take part

員  IN - member

財  ZAI, SAI - money, wealth, property

b) 弦 -> 畜 -> 累 -> 結  

弦  GEN, tsuru - string, bowstring

畜  CHIKU - animal raising, domestic animal

累  RUI - involvement, trouble, accumulation

結  KETSU, musu(bu), yu(u) - tie up, bind