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  1. (defn format-lic [lic] (apply str (drop-last (interleave (map #(apply str %1) (partition 5 lic)) "---- "))))
  2. (println (format-lic "ABCSADDSKJKJKJKJKJKJKJKJHGGGFGG"))
Success #stdin #stdout 0.86s 214656KB
stdin
Standard input is empty
stdout
ABCSA-DDSKJ-KJKJK-JKJKJ-KJKJH