Generating Computer Name automatically without "-"

Hi,

I am generating PC name with Sysprep unattend and setup generates PC name automatically based on Organization /Owner information .... but it adds a hyphen "-" after organization /user and then appends a random number , all I need to know if its possible to omit "-" in PC name.?

Example 1234567-xyzxyz

Here 8th character is "-" which I don't want to have but appended automatically.

N.A.Malik