Some while ago, an experienced member helped me out with a similar task I had to deal with. Thank you so much "Jakobshavn"
So here is a new similar task that challenges me.
It seems that once again I do not get anywhere with my tries, so I think a few lines of VBA scripting is needed to do the job.

Cell A2 contains one word max length 20 chars.
This word should be checked against an other word, if any of its letters exists in the other word.
The other word (to which is compared), resides exactly above, in cell A1.
A simple check with true/false result.

If some "weird" alphabet function will be used, please have in mind that I need to do that in Greek language-characters (24 letters).
Thanks guys.
This forum is awosome.