user-defined number format: left-to-right

In Libre Office Base( v5.0.4.2),I had defined a new number format as DD-DD-DD.DDD, where D is a digit, as:
##-##-##.00

In this case, 1234 showed as:
--1.234

But I need that the numbers have been comsumed by the format as left-to-right. Below an example.
12-34-00.000

How can I do that?

Thank you.

It appears you are trying to get a numeric field to react as a text field by filling left-to-right vs right-to-left. If instead you make the table field an 11 character Text field and use a Pattern Field on your input form it can be done. In the Pattern field properties, use an Edit mask of NNLNNLNNLNN and for Literal mask use 00-00-00.00 and Strict format as Yes.