Here are 3 different sayings encoded using the same code:
PXPTV IEHRF PGBPGFPTL GHY S LYHTU.
-- CJEEJSU LNSAPLQPSTP, "NPGTV XJ"
JD UHTP HD RL XSERPF DHHF SGF INPPT SGF LHGB SKHXP NHSTFPF BHEF, JY CHREF
KP S UPTTJPT CHTEF.
-- M.T.T. YHEAJPG
CTJYP VHRTLPED S YNTPSYPGJGB EPYYPT SGF QPG S FPDJSGY TPQEV.
I give up!