王x王, 辛x辛 = BAN

斑马, Bānmǎ, Zebra,
加班,  jiābān, work overtime
班  bān Class
瓣  bàn Flap
辧  biàn Be in trouble
辦  bàn Do
辨  biàn Distinguish
辩  biàn Argue
辬  bān To make a living               My pinyinizer recognized these all as BAN. They are all 1st or 4th tone.