How quickly can you find out what is unusual about this paragraph? It looks so ordinary that you would think that nothing was wrong with it and in fact, nothing is. But it is unusual. Why? If you study it may dawn on you, but you still may not find anything odd. You should do it without any coaching. No doubt if you work at it for long, you might find out. I don't know. Now, go to work and try your luck. Stay cool.
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The paragraph does not contain the letter e, the most common letter used in English.