Cipher/Decipher

This program allows you to Create ciphered messages from a X number of switched letters, using 2 key words.

example:
key words: abcde
fghij

the message "Cipher" becomes "hdpcjr", by replacing all occurrences from the letters in keyword 1 to the keyword2
all occurrences of "a" becomes "h" and vice-versa, "b becomes "g"....and so on.