Letter sent by a college student to his Dad

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.

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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