823. What character can be added to both of these characters to give other characters? 旦_ -> _⺣

Answer:

旦  TAN, DAN, akira, tadashi, asa morning 

⺣  The "Rekka" radical - fire

Add 里: 旦+里 里+⺣ 

里  RI, sato - village

量  RYOU, haka(ru) - quantity, measure, weigh

黒  KOKU, kuro(i) - black