2886. What character can be added to both of these characters to give other characters? 日_ -> _要

日 NICHI, JITSU, hi, ka - sun, day

要 YOU, i(ru) - essential(s) need

Add 月:日+月 月+要 

月 GETSU, GATSU, tsuki - moon, month

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

腰 YOU, koshi - pelvis, loins, hips, back