Are there always just 2 letters (or none)?

On Tue, 07 Jun 2005 17:32:03 GMT, "jeremy via OfficeKB.com"
wrote:

How do I make every thin in a column that is not 4000 assigned the "0" and
every cell 4000 assigned the "1" (and ignoring the letters)?

column might look like

4002
AB009
4001ab
2004
0078
45