Dear Dad,
$chool i$ really great. I am making lot$ of friend$ and $tudying very hard.
With all my $tuff, I $imply can't think of anything I need, $o if you would like, you can ju$t $end me a card, a$ I would love to hear from you.
Love, Your $on.

Reply from dad...

Dear Son,
I kNOw that astroNOmy, ecoNOmics, and oceaNOgraphy are eNOugh to keep even an hoNOr student busy. Do NOt forget that the pursuit of kNOwledge is a NOble task, and you can never study eNOugh.
Love, Dad