Hello Rodriguez,
["0":"9"] != ["0","1","2","3","4","5","6","7","8","9"]
["0":"9"] = [["0","1","2","3","4","5","6","7","8","9"]]
where ["0":"9"] gives you a list inside the list!
What you want is
List = "0":"9" // gives ["0","1","2","3","4","5","6","7","8","9"]