object MorseCode extends App {

  private val code = Map(
    ('A', ".-     "), ('B', "-...   "), ('C', "-.-.   "), ('D', "-..    "),
    ('E', ".      "), ('F', "..-.   "), ('G', "--.    "), ('H', "....   "),
    ('I', "..     "), ('J', ".---   "), ('K', "-.-    "), ('L', ".-..   "),
    ('M', "--     "), ('N', "-.     "), ('O', "---    "), ('P', ".--.   "),
    ('Q', "--.-   "), ('R', ".-.    "), ('S', "...    "), ('T', "-      "),
    ('U', "..-    "), ('V', "...-   "), ('W', ".-   - "), ('X', "-..-   "),
    ('Y', "-.--   "), ('Z', "--..   "), ('0', "-----  "), ('1', ".----  "),
    ('2', "..---  "), ('3', "...--  "), ('4', "....-  "), ('5', ".....  "),
    ('6', "-....  "), ('7', "--...  "), ('8', "---..  "), ('9', "----.  "),
    ('\'', ".----."), (':', "---... "), (',', "--..-- "), ('-', "-....- "),
    ('(', "-.--.- "), ('.', ".-.-.- "), ('?', "..--.. "), (';', "-.-.-. "),
    ('/', "-..-.  "), ('-', "..--.- "), (')', "---..  "), ('=', "-...-  "),
    ('@', ".--.-. "), ('"', ".-..-. "), ('+', ".-.-.  "), (' ', "/")) // cheat a little

  private def printMorse(input: String): Unit = {
    println(input)
    println(input.trim.replaceAll("[ ]+", " ").toUpperCase
      .map(code.getOrElse(_, "").trim).mkString(" "))
  }

  printMorse("sos")
  printMorse("   Hello     World!")
  printMorse("Rosetta Code")

}