After I apologized too often for my bad typing, my sister-in-law sent me the following text to demonstrate that our brain can understand words even if only the first and last letters are correct
Yet aoccdrnig to a sudty at Cmabrigde Uinervtisy, it deosn’t mttaer in waht oredr the ltteers in a wrod are, the olny iprmoetnt tihng is taht the frist and lsat ltteer be at the rghit pclae. The rset can be a ttoal mses and you can sitll raed it wouthit a porbelm. Tihs is bcuseae the huamn mnid deos not raed ervey lteter by istlef, but the wrod as a wlohe.
Apparently this text is well-known to language people!