A Boy wrote this letter to his Father Dear Dad! Thi$ $chool i$ really great. I am making lot$ of friend$ and $tudying very hard. Mathematic$, a$tronomy, and economic$ are the $ubject$ I like. With all my $tuff, I $imply can't think of anything I need, $o if you would like, you can ju$t $end me a po$t card, a$ I would like my friend$ to think that my parent$ love me. I hope to receive your word$. $end it to me $oon, Your de$perate $on --------------------- A week later he received a letter from home: Dear Son! I kNOw that trigoNOmetry, astroNOmy, and ecoNOmics are eNOugh to keep even an hoNOr student busy. Do NOt forget that the pursuit of kNOwledge is a NOble task, and kNOw that NO one can ever learn eNOugh. With Love, Your NOt so kNOwledgeable Dad.