Misspelt

All old hospitals here have tunnels interconnecting one building to the other..very useful in wartime as they would escape through the tunnels..

I usually go through the connecting tunnel to the main hospital...the other day I noticed they have popped A4 signs on the floor..the signs read...

                                 CAUTION, UNEVAN FLOOR TILES...

the first sign I came across then had a stroke through the A and an E next to the stroke...the second sign had the same thing done to it...by the time I got to the third sign it had...Time to go back to school...hehehe