(def tbl [[0 3 1 7 5 9 8 6 4 2]
          [7 0 9 2 1 5 4 8 6 3]
          [4 2 0 6 8 7 1 3 5 9]
          [1 7 5 0 9 8 3 4 2 6]
          [6 1 2 3 0 4 5 9 7 8]
          [3 6 7 4 2 0 9 5 8 1]
          [5 8 6 9 7 2 0 1 3 4]
          [8 9 4 5 3 6 2 0 1 7]
          [9 4 3 8 6 1 7 2 0 5]
          [2 5 8 1 4 3 6 7 9 0]])

(defn damm? [digits]
  (= 0 (reduce #(nth (nth tbl %1) %2) 0 
    (map #(Character/getNumericValue %) (seq digits)))))