public static void Test()
{
Solution s = new Solution();
//Console.WriteLine(s.NumPoints());
Console.WriteLine(s.ReformatNumber("1-23-45 6"));
Console.WriteLine(s.ReformatNumber("123 4-567"));
Console.WriteLine(s.ReformatNumber("123 4-5678"));
Console.WriteLine(s.ReformatNumber("12"));
Console.WriteLine(s.ReformatNumber("--17-5 229 35-39475 "));
}