I guess you are done with Caesar I, aren't you?
The big problem with caesar is that it does not allow digits or other characters.
I have fixed this, and now I can use any ascii character in the plaintext.
The keyspace has increased from 26 to 128 too. \o/

Enjoy!

1F 47 47 3C 20 42 47 3A 04 20 51 47 4D 20 4B 47
44 4E 3D 3C 20 47 46 3D 20 45 47 4A 3D 20 3B 40
39 44 44 3D 46 3F 3D 20 41 46 20 51 47 4D 4A 20
42 47 4D 4A 46 3D 51 06 20 2C 40 41 4B 20 47 46
3D 20 4F 39 4B 20 3E 39 41 4A 44 51 20 3D 39 4B
51 20 4C 47 20 3B 4A 39 3B 43 06 20 2F 39 4B 46
7F 4C 20 41 4C 17 20 09 0A 10 20 43 3D 51 4B 20
41 4B 20 39 20 49 4D 41 4C 3D 20 4B 45 39 44 44
20 43 3D 51 4B 48 39 3B 3D 04 20 4B 47 20 41 4C
20 4B 40 47 4D 44 3C 46 7F 4C 20 40 39 4E 3D 20
4C 39 43 3D 46 20 51 47 4D 20 4C 47 47 20 44 47
46 3F 20 4C 47 20 3C 3D 3B 4A 51 48 4C 20 4C 40
41 4B 20 45 3D 4B 4B 39 3F 3D 06 20 2F 3D 44 44
20 3C 47 46 3D 04 20 51 47 4D 4A 20 4B 47 44 4D
4C 41 47 46 20 41 4B 20 45 45 3E 3C 45 40 46 3A
3A 3D 39 3E 06