Custom Text Filter for this particular case

[tinfanide]

I have a large set of data like:



A
abandon
arrange
B
Bet
Bit
C
come
customise

I want to delete all the cells that contain the uppercase letters "A", "B", "C"... (there are 26 of them - in the alphabet) a long list of them

I bet it'd be somewhere in the text filter that can resolve it but I tried some combinations like

contains
begins with
ends with

with the use of "?", "*" wildcards

How can the job be done in Excel 2010?