what are kanji that can be flipped, but not rotated?


Plenty of kanji are symmetrical on the y-axis and x-axis. Plenty of kanji are
symmetrical only on the y-axis.

What are some kanji that are only symmetrical on the x-axis? I don't know one.

What kanji change into another kanji when they are rotated and/or flipped?
Here is one that I know:  
干 -- flip --> 士




Here's two that have just horizontal symmetry, at least in some fonts: 旧 咺




Here's two that have just horizontal symmetry, at least in some fonts: 旧 咺

