#!/usr/bin/python
#-*- coding:utf-8 -*-

import sys
def proba(str):
    tmp=""
    str=str.upper()
    for c in str:
        if (( ord(c)>=ord('A') and ord(c)<=ord('Z'))):
            tmp+=c
    list=strToList(tmp)
    print list
    listProba = [0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0 ]
    for i in range(0, len(tmp)):
        print (list.count(list[i])/len(tmp))*100;
        listProba[(ord(list[i])-ord('A'))]=(list.count(list[i])/len(tmp))*100;
    print listProba



def strToList(str):
    list = []
    for c in str :
        list.append(c)
    return list

def cryptage(strStart, key):
    i = 0
    res=""
    key=key.upper()
    nbKey=len(key)
    strStart=strStart.upper()
    key=strToList(key)
    for c in strStart :
        if (( ord(c)>=ord('A') and ord(c)<=ord('Z'))):
            tmpMot=ord(c)-ord('A')
            tmpCle = ord(key[i%nbKey])-ord('A')
            print chr((tmpMot + tmpCle)%26 + ord('A'))
            i = i + 1
        else :
            print c


def decryptage(strStart, key):
    i = 0
    res=""
    key=key.upper()
    nbKey=len(key)
    strStart=strStart.upper()
    key=strToList(key)
    for c in strStart :
        if (( ord(c)>=ord('A') and ord(c)<=ord('Z'))):
            tmpMot=ord(c)-ord('A')
            tmpCle = ord(key[i%nbKey])-ord('A')
            tmp = chr((tmpMot - tmpCle)%26 + ord('A'))
            if (( ord(tmp)<ord('A') )) :
                tmp=chr(ord(tmp)+26)
            print tmp
            i = i + 1
        else :
            print c


def hack(strStart):
    tmp = ""
    strStart=strStart.upper()
    for c in strStart:
        if (( ord(c)>=ord('A') and ord(c)<=ord('Z'))):
            tmp+=c
    tmp=strToList(tmp)
    proba(strStart)





def main():
    choix=int(-1)

    print"\n   1 - Cryptage \n\n   2 - Décryptage\n\n   3 - Décryptage forcé\n\n   0 - Quitter\n\n";
    while (( choix!=1 and choix!=2 and choix!=3 and choix!=0 )):
        choix=int(raw_input("Votre choix : "))
    if choix==0 :
        sys.exit()
    strStart = raw_input("Entrez la chaine à  analyser : ")
    if choix!=3 :
        key=raw_input("Entrez votre clé de cryptage : ")
    if choix==1 :
        cryptage(strStart, key)
    if choix==2 :
        decryptage(strStart, key)
    if choix==3 :
        hack(strStart)


main()