Which regex can I use to replace Greek capital vocals with tonos to ones without it, in Bulk Rename Utility application?

I would like to replace in a lot of filenames, the Greek capital vocals with tonos, with the ones without it:

Ά> ΑΈ> ΕΉ> ΗΊ> ΙΌ> ΟΎ> ΥΏ> Ω

I know how to replace them one by one, but I think RegEx is the best approach, to replace all of them at once.Can someone help me with the syntax, please?Thanks.