### 1. Chiffrement de César

alphabet = ['a', 'b', 'c', 'd', 'e', 'f', 'g', 'h', 'i', 'j', 'k', 'l', 'm', 'n', 'o', 'p', 'q', 'r', 's', 't', 'u', 'v', 'w', 'x', 'y', 'z']



mystere_cesar = "lxehg lnxmhgx cnexl vxltk ikhmxzxtbm lt vhkkxlihgwtgvx lxvkxmx xg kxfietvtgm vatjnx exmmkx itk vxeex jnb lx mkhnox mkhbl ktgzl ienl ehbg wtgl et eblmx wxl exmmkxl tbglb ex fhm khfx wxoxgtbm nkia vx ikhvxwx mkxl lbfiex lnyybltbm ltgl whnmx t mkhfixk lxl twoxkltbkxl ftbl be gx kxlblmx itl t ngx tgterlx tmmxgmbox be lnyybm xg xyyxm wx vhfimxk exl exmmkxl wn fxlltzx vabyykx et ienl ykxjnxgmx kxfietvx ikxljnx mhnchnkl et exmmkx x"

### 2. Chiffrement par substitution

az = "azertyuiopqsdfghjklmwxcvbn"

ORDRE_FR = "easnitruoldcpmvqfgbhjxyzkw"

mystere_substitution = "ry vjymfjwj hfjnaj aj hrmrvo rdrxj ra tfvkf djkfsj ar uayh rvnfjvvj kjhndfuofiv nivvyj kj ar wjobikj pyf ujdwjo kj nrhhjd ajh nbfggdjwjvoh urd hyxhofoyofiv fa djwrdpyj pyj krvh yvj arvsyj kivvjj njdorfvjh ajoodjh hivo xjryniyu uayh gdjpyjvojh pyj ajh ryodjh jv niwuorvo ajh hewxiajh ky wjhhrsj nbfggdj iv ujyo kivn kjmfvjd pyjaajh ajoodjh hj nrnbjvo kjddfjdj ajh hewxiajh ajh uayh niydrvoh uyfh niwuajojd ajh wioh yv urd yv niwwj krvh yvj sdfaaj kj wioh ndifhjh njooj wjobikj r jy kjh nivhjpyjvnjh odrsfpyjh jv wfaaj nfvp njvo pyrodj mfvso hfc wrdfj hoyrdo djfvj kjh jnihhrfh djojvyj udfhivvfjdj jv rvsajojddj niddjhuivkrfo jv hjndjo rmjn yv sdiyuj kj nivqydjh pyf udiqjorfjvo kj oyjd ar djfvj jafhrxjob uiyd uarnjd wrdfj hyd aj odivj ajydh ajoodjh jorfjvo nbfggdjjh urd hyxhofoyofiv wrfh obiwrh ubjafuujh ry hjdmfnj kj ar djfvj urdmfvo r ajh kjndeuojd wrdfj hoyrdo gyo qysjj nivkrwvjj uyfh jcjnyojj jv gjmdfjd wfaaj nfvp njvo pyrodj mfvso hjuo"