You may try cryptanalyzing the following texts, which were obtained from an english text by a substitution cipher:
qfl hcvps px v answlcezk ncjvs; pq xqvcqx qfl bpszql rnz jlq zt ps qfl bncspsj vsw wnlx snq xqnt zsqpk rnz jlq qn qfl neepgl. -- cnhlcq ecnxq
coxbx tbx cvk cdgxr di t gti'r adhx voxi ox rokqau ikc rnxpqatcx: voxi ox pti'c thhkbu dc, tiu voxi ox pti. -- gtby cvtdi
probabilities of letters in English text: a .082 b .015 c .028 d .043 e .127 f .022 g .020 h .061 i .070 j .002 k .008 l .040 m .024 n .067 o .075 p .019 q .011 r .060 s .063 t .091 u .028 v .010 w .023 x .001 y .020 z .001 sorted: e .127 vowel t .091 a .082 vowel o .075 vowel i .070 vowel n .067 s .063 h .061 r .060 d .043 l .040 c .028 u .028 vowel m .024 w .023 f .022 g .020 y .020 p .019 b .015 q .011 v .010 k .008 j .002 x .001 z .001
created by A. Betten, August 23, 2003, last change August 23, 2003