Hala Dabaji, an artist with a keen urban eye, located this mutating graffiti. You can see some of her work on her website.
"Series of panels at the entrance of a building site, next to my studio.
The construction workers move the panels each time they open / close the entrance to the site
They are definitely not playing standard scrabble. They say these are the Beirut Building Boom vocabulary" Hala Dabaji