Listing files using pattern matching

I have a requirement to list files using find command

My folder contains below list of files with out extention.

ABC.123.MNO.1234
ABC.123.1234
ABC.123.7890
ABC.123.MNO.654
KLM.123.MNO.456

File with extension

ABC.123.1234.txt

I have a requirement to exclude only ABC.123.* type files and list others. Even though files having MNO contains this pattern i should not exclude. Even if file ends with .txt or .doc it should not be excluded. That is ABC.123.1234.txt should not be excluded.

So I am writing my find command as

find -type f ! -name "ABC.[0-9].[0-9]*^."

But I am not getting what is required. Can any one please let me know if I am doing wrong any where. As per my requirement I cannot use grep, -regex, or -regex attributes to find command.

any thoughts...please help

facing same sought of problem as my team lead had gave this work to me and started shunting please can anyone help me too also

Any reason why you are not allowed to use -regex, etc.? That makes it smack of homework.

Simon,

Actually there are many find based conditions in the script..i guess..the only thought might be is that using regex may disturb others..however, now it is fine. I was approved to use regex.

So, I tried using like this.

find -type f ! -regex "ABC.[0-9].[0-9]*^."

Still it is not working. Can you help me.

i tried as below but still not working

find -type f ! -regex "/ABC.[0-9].[0-9]*^./"

please help

Please let me know if there is any wrong in the syntax

Sorry not to have responded - had some timing and power issues ...!
If I find (pardon the pun!) that I have to use negation when doing things, what I often do is invert the negation and start simple, just to prove what I'm trying actually works.
What you will find is that the -regex operator deals with the entire path string returned by the find which is unlike the -name operator which acts purely and wholly on the name.
Assuming a directory content of:

My initial stab is as follows. It is almost certainly wrong since trying to exclude from exclusions can be a little hard to follow!