A Letter from College:

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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The Reply:
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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