Uses defined letters array (letters, numbers), not defined letters will be set as ? when crypting the message
Letter shifting value: negative=backwards in letterlist, positive forwards. 0 does not crypt at all
Execute: python3 crypter.py
Use menus for operations:
Ceasar Crypter, Current shifter value: -4
Used alphabet: [' ', '.', '1', '2', '3', '4', '5', '6', '7', '8', '9', '0', '-', '?', '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', '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', 'Å', 'Ä', 'Ö']
Number of letters: 71
*********** Select operation *************
1 - Crypt
2 - Decrypt
3 - Crypting shifter value (current: -4 )
x - Quit
?1
String to be crypted:Kissa
Crypted: Geoo9