As part of my now ongoing project to create a comprehensive drawing register,
I need to list the latest revision of a drawing ever issued. These may or may
not be in order, as sometime there will be a need to issue an older drawing.

In a row, I will have letters (A - Z, AA - AZ), Numbers (01 - 99) and / or (1
- 99), as well as /, \ or -.

I currently use the following function (where I29 to DS29 is my range):
=IF(SUM(--ISTEXT(I29:DS29)),CHAR(MAX(IF(I29:DS29<"",CODE(I2 9:DS29),""))),MAX
(I29:DS29))

This returns the highest numeric number from 1 - 9, and then from A - Z.

However, it only registers up to number 9. Any numbers over 9 will return
it's multiple. Eg. 11 will be shown as 1, 25 will be shown as 2, 33 as 3 and
so on.

It will correctly display the alphabetic value up to Z, however, the same
applies to double letters. AA, AT, AZ will all return as A. The only ranges I
can work with then are 1 - 9 and A - Z. The function does pick up the
backslash \, and it does pick up / and - if I use apostrophe before, but I
don't want to use this, as users will be entering info and will forget to put
the apostrophe in.

How do I make it so that the function will return the values, in addition to
1 -9 and A - Z, of the numbers from 10-99, double letters AA - AZ, as well as
any keyboard symbols.

TIA

David

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