letter home from school

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.
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