Decrypting Shift Cypher -- Sage

#(D) AS = AlphabeticStrings() SHC = ShiftCryptosystem(AS) R = IntegerModRing(26)

ct=AS.encoding("ZILYPYLSNBIOMUHXBUWECHAUNNBYFYUPYMIZYPCFNBYLYCMIHYMNLCECHAUNNBYLIIN"); ct

ZILYPYLSNBIOMUHXBUWECHAUNNBYFYUPYMIZYPCFNBYLYCMIHYMNLCECHAUNNBYLIIN

ZILYPYLSNBIOMUHXBUWECHAUNNBYFYUPYMIZYPCFNBYLYCMIHYMNLCECHAUNNBYLIIN

words=SHC.deciphering (20,ct);words

FOREVERYTHOUSANDHACKINGATTHELEAVESOFEVILTHEREISONESTRIKINGATTHEROOT

FOREVERYTHOUSANDHACKINGATTHELEAVESOFEVILTHEREISONESTRIKINGATTHEROOT

#So the original plain text message was: "For every thousand hacking at the leaves of evil, there is one striking at the root"

'For every thousand hacking at the leaves of evil, there is one striking
at the root'

'For every thousand hacking at the leaves of evil, there is one striking at the root'

Decrypting Shift Cypher