It's Prttey fnuny how we can raed tihs einrte snetnece wtih all tehse ltters all out of palce, and we can cnotniue to keep raednig and sitll mekas snece of waht we are raeding. No mttar how mnay tmies you raed tihs oevr and oevr you can sitll mkae snece of it.
How is taht pssoible?
As long as the first and last letter of the word is in its correct position, you can position the middle letters in any order and still make sence of it. Our eyes just glance at he first and last letters of a word.