(defn input []
  (->> (.split #"\s" (read-line))
    (map #(Integer/parseInt %))))

(defn SmallAndLargeInteger [[A B K]]
  (->>  (concat 
          (take K (range A (inc B))) 
          (take K 
            (take-while #(<= A %) 
              (iterate dec B))))
    (apply sorted-set)
    (map println-str)
    (apply str)))

(->> (input)
  SmallAndLargeInteger
  print)