_ _ _ _ 4-letter word can be written _ _ _ _ _ _ _ , _ _ _ _ _ _ _ _ or upside down, and can still be _ _ _ _ from _ _ _ _ to _ _ _ _ _?

Set your cypher wheel to: big wheel = g and little wheel = A

Agent! Solve this riddle!

QBUN

ZILQULX

VUWEQULX

LCABN

FYZN

LYUX