which is the best way to find some files

[lina <lina.lastname@gmail.com>]

Hi,

I have some files like

a_1.txt a_2.txt
a_1.doc a_2.doc
a_1.xxx a_2.xxx

I only want to keep a_*.xxx

but delete all other a_*.doc or .txt and more

rm a_*.[^{xxx}] not work,

Thanks for suggestions,

Best regards,