2416. What character can be added to both of these characters to give other characters? 言_ -> _争

言  GEN, GON, i(u), koto - say, speech

争  SOU, araso(u) - dispute, argue

Add 青:言+青 青+争   

青  SEI, SHOU, ao(i) - blue

請  SEI, SHIN, ko(u), u(keru) - ask for, receive

静  SEI ,JOU, shizu(ka), shizu(meru) - quiet, peaceful, still, quieten