Impossible? No, just unlikely.
The fairly long One For All All For One ambigram displayed to the left certainly catches your eye with the way the letters come together.
As you can see this design reads 'One For All' when upright and reads 'All For One' when upside-down.
Simply mouse over the design to see it rotate.
All items in the FlipScript store are already displaying the One For All All For One ambigram. To see them, use the menu bar at the top to navigate to an item and you will see every product in that category personalized with the One For All All For One ambigram. You can change the design at any time with the 'Create New Ambigram' button on the top of this page.