Also, please read about use of code tags for DATA as well as for code. As you've presented your data, we cannot readily distinguish between a space and a tab. See Markup in the Monastery.

AFTER the http://perldoc.perl.org/perlintro.html toolic cited (and which is available from the command line on your own machine (eg: C:\ perldoc perintro<CR> on a Win machine or at your bash (etc) prompt on a *nix-ish box), assuming you've installed any standard Perl), you may wish to visit our well-stocked Tutorials, starting with those on reading from a file.