1355. What character can be added to both of these characters to give other characters? 革_ -> _頁

Answer:

革  KAKU, kawa - leather, reform

頁  KETSU, peeji - page

Add 化:革+化 化+頁 

化  KA, KE, ba(keru) - transform

靴  KA, kutsu - shoe

傾  KEI, katamu(ku), katamu(keru) - be inclined, incline, tilt