dump the real string

From: toylet (toylet_at_mail.hongkong.com)
Date: 02/25/04 

Date: Wed, 25 Feb 2004 21:03:40 +0800

my $line = <>;

I input "a" and press enter.

Now $line should contain 2 bytes: 'a' and end-of-line character.

How could I print the content of $line (both bytes) in hex format? 

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