# -*- coding: cp1252 -*-
"""
    Caesar cipher

    Shifts the letter to be the letter that comes x step after it
    x = the key
    So if the key is 3 A would become D
"""

#list of all letters from A-Z
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","å","ä","ö"]
#list for text to encrypt
norm_li = []
#encrypted list
ectd_li = []
#decrypted list
decr_li = []

def encrypt(li, key):
    for i in li:
        norm_li.append(i)

    for x in norm_li:
        if x == " ":
                ectd_li.append("")
        for a in alphabet:
            if x.lower() == a.lower():
                if x == x.upper():
                    ectd_li.append(alphabet[(len(alphabet)-(len(alphabet)-key))-1].upper())
                else:
                    ectd_li.append(alphabet[(len(alphabet)-(len(alphabet)-key))-1])



    print "Encrypted text: ",
    for char in ectd_li:
        print char,


def decrypt(li, key):

        for x in ectd_li:
            if x == "":
                decr_li.append("")
            for a in alphabet:
                if x.lower() == a.lower():
                    if x == x.upper():
                        decr_li.append(alphabet[alphabet.index(a)-key].upper())
                    else:
                        decr_li.append(alphabet[alphabet.index(a)-key])

        print "Decrypted text: ",
        for char in decr_li:
            print char,


encrypt(raw_input("Text you want encrypted: "), input("Encryption key: "))
print
decrypt(ectd_li,input("Enter the right key to decrypt the message: "))