I see, I knew it !
Changed it a little ... should be a little better, but still looks not totally right.
I guess I wasn't totally in front of the building, OR the building is not well made
Looks like the building counts 7 windows at the right side, 6 windows at the left side aswel.
On the right side, it has balconies, on the left not.
Ok wait, find the 10 differences...