A= aaa
B= aab
C= aac
D= aba
E= abb
F= abc
G= aca
H= acb
I= acc
J= baa
K= bab
L= bac
M= bba
N= bbb
O= bbc
P= bca
Q= bcb
R= bcc
S= caa
T= cab
U= cac
V= cba
W= cbb
X= cbc
Y= cca
Z= ccb
Example:
Keys: a,b,c
Cipher: baccacaacbab
Decipher: LUCK
