Execute Clojure Online

    //Word length and letters list
   def main(args: Array[String]) {
        
        def printAllCombos(letters: List[Char]) = {
            
        }
        
        def getWords(numbers: List[Int]) = {
            var letters: List[List[String]] = List()
            for (num <- numbers) { //loop for length of list and append values
                letters = num match {
                    case 0  => List("0") :: letters
                    case 1  => List("1") :: letters
                    case 2  => List("A", "B", "C") :: letters
                    case 3  => List("D", "E", "F") :: letters
                    case 4  => List("G", "H", "I") :: letters
                    case 5  => List("J", "K", "L") :: letters
                    case 6  => List("M", "N", "O") :: letters
                    case 7  => List("P", "Q", "R", "S") :: letters
                    case 8  => List("T", "U", "V") :: letters
                    case 9  => List("W", "X", "Y", "Z") :: letters
                }
            }
            letters = letters.reverse
        }
        getWords(List(2, 4))
        
   }