Crackin' 2

A boy sent a letter to his father:

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. $o if you would like to, you can ju$t $end me a card, a$ I would love to hear from you.

Love,

Your $on.

The Reply:

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