Most people use spellchecker in word processing programs to check their spellings. Once somebody wrote the following and checked its spelling. The spellchecker found no mistake in it and the person posted this on his billboard.
(How it should have been written, see on next page.)

Who wood have guest
The Spell Chequer wood super seed
The assent of the editor
Who was once a mane figure?

In deed did it altar
His work lode's coarse.
Once, awl sought his council;
Now nun prophet from hymn.

--Anonymous