Caesar cipher: Difference between revisions

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====Alternate version====
1. NoteProgram
<pre>if caesar(txt offset) = cyphertext then caesar(cyphertext -offset) = txt</pre>
 
2. Program
 
<lang lisp>(defconstant +a+ "AaBbCcDdEeFfGgHhIiJjKkLlMmNnOoPpQqRrSsTtUuVvWwXxYyZz")
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txt))</lang>
 
32. Execution
 
See 1.
 
{{out}}
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