Let your brains chew on this:<br><br>Pronounced as one letter,<br>And written with three,<br>Two letters there are,<br>And two only in me.<br>I'm double, I'm single,<br>I'm black, blue, and gray,<br>I'm read from both ends,<br>And the same either way.<br>What am I?<br><br>[color:red]The cure for boredom is curiosity. There is no cure for curiosity.</font color=red><br>