Here are 3 different sayings encoded using the same code:
Z PBNX MXNXE CXR TA SKPVVCZMH ZMRXEWXEX OZRP TA XDQKBRZVM.
-- TBEL ROBZM
BCC HXMXEBCZFBRZVMS BEX WBCSX, ZMKCQDZMH RPZS VMX.
-- TBEL ROBZM
DVM'R PBRX AVQESXCW ZM RPX TVEMZMH -- SCXXI RZCC MVVM.
I give up!