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  1. (defun boba (str)
  2.   (loop :with b-p :for c :across str
  3.         :count (case c
  4.                  (#\а b-p)
  5.                  (#\б (setf b-p t) nil)
  6.                  (t   (setf b-p nil)))))
  7.  
  8. (print (boba "Ааа ба баа ааба"))
Success #stdin #stdout 0s 535040KB
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https://ideone.com/tc7IPG
language:
Common Lisp (clisp 2.49.92)
created:
7 years ago
visibility:
public

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