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!

38 60 60 55 20 5B 60 53 1D 20 6A 60 66 20 64 60
5D 67 56 55 20 60 5F 56 20 5E 60 63 56 20 54 59
52 5D 5D 56 5F 58 56 20 5A 5F 20 6A 60 66 63 20
5B 60 66 63 5F 56 6A 1F 20 45 59 5A 64 20 60 5F
56 20 68 52 64 20 57 52 5A 63 5D 6A 20 56 52 64
6A 20 65 60 20 54 63 52 54 5C 1F 20 48 52 64 5F
18 65 20 5A 65 30 20 22 23 29 20 5C 56 6A 64 20
5A 64 20 52 20 62 66 5A 65 56 20 64 5E 52 5D 5D
20 5C 56 6A 64 61 52 54 56 1D 20 64 60 20 5A 65
20 64 59 60 66 5D 55 5F 18 65 20 59 52 67 56 20
65 52 5C 56 5F 20 6A 60 66 20 65 60 60 20 5D 60
5F 58 20 65 60 20 55 56 54 63 6A 61 65 20 65 59
5A 64 20 5E 56 64 64 52 58 56 1F 20 48 56 5D 5D
20 55 60 5F 56 1D 20 6A 60 66 63 20 64 60 5D 66
65 5A 60 5F 20 5A 64 20 5E 5E 57 55 5E 59 5F 53
53 56 52 57 1F