multiple data type validation

Hi gurus.

I am trying to sort out a validation rule which will allow users to enter certain values into column A. However, the difficult bit is that the values can be a set of numeric OR text strings. I'll elaborate:

The text entries that will be permitted are:

Faulty
Free
Reserved

The numeric strings permitted should be of the following formats only (here's the tricky one). The X's shown below are ofcourse representing any number from 0 to 9.

2xxxx
2004xxxx
2005xxxx
2007xxxx

I hope this will be enough for some1 to help out.

Really appreciate everyone's time!

thanks

difficult one i guess huh? :-(

No 100% fit but in the right direction I hope:

Name List contains the following:
Free
Reserved
Faulty
0002????
2004????
2005????
2007????

Note The 000 before 2???? to make it working. I hope you can live with that.

Validation Custion function of cell C13:
=IF(ISNA(LOOKUP(2;SEARCH(List;LEFT(C13;8))));0;1)

Gr,
Ricardo