anchor.diff:  (defun reverse-cypher (msg)
     (reverse msg))
   
  -(reverse-cypher "123")
  -
   (defconstant +letters+ "abcdefghijklmnopqrstuvwxyz")
   
   (defun get-char-with-shift (c shift)
  
positive.code:     (loop for c across src do (vector-push c array)) array))
  
  (transposition-encrypt "Common sense is not so common." 8)
  
  (defun transposition-decrypt (msg key)
    
  )
  
  (ceiling 10 8)
  
negative.code:   (ceasar-encrypt str (- 0 shift)))
  
  (ceasar-encrypt (ceasar-encrypt "ab c" 28) -28)
  
  (defun transposition-encrypt (msg key)
    "Transpose characters in msg by size of key"
  