Here are 3 different sayings encoded using the same code:
DKK OGPGNDKMSDXMEPY DNG IDKYG, MPZKVAMPO XQMY EPG.
-- BDNJ XTDMP
PE WMEKGPZG, OGPXKGBGP -- PE WMEKGPZG, M HGO EI REV! ZEPYMAGN XQG IVNPMXVNG!
-- YQGNKEZJ QEKBGY
REV QDWG GORFXMDP IKV: REV'NG OEMPO XE HG D BVBBR.
I give up!