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