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* * This methods count how many Morse codes has symbols equal to the len input parameter. For example, if the input parameter is 1,
* * This methods count how many Morse codes has symbols equal to the len input parameter. For example, if the input parameter is 1, this method should return 2 (The Morse code for 'E' is '.' and for 'T' is '-'.) * * * * @param len * @return the number of keys of which Morse code is encoded with 'len' symbols. */ public int countByCodeLength(int len) { throw new UnsupportedoperationException("replace with your implementation")
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