Here are 3 different sayings encoded using the same code:
GD KMKNXXB DNIOM CQVO DLNT DLVOO UOOIM DQ JVOJNVO N HQQZ GCJVQCJDK MJOORL.
-- CNVI DUNGT
DLGM XGWO GM BQKVM. MQCO QW GD UNM HGEOT DQ BQK; DLO VOMD, BQK CNZO BQKVMOXW.
A: ULB ZGZ COTNRLOC SOHGT GTENZO XOSNTQT?
N: DQ GCJVOMM FQZGO WQMDOV.
I give up!