$ perl x.pl first age 600000 45 Bill Gates 55000 29 George Tester 55000 29 Joe Tester 55000 29 Sally Developer 600000 41 Steve Ballmer $ perl x.pl age first 55000 29 George Tester 55000 29 Joe Tester 55000 29 Sally Developer 600000 41 Steve Ballmer 600000 45 Bill Gates $ perl x.pl age last first 55000 29 Sally Developer 55000 29 George Tester 55000 29 Joe Tester 600000 41 Steve Ballmer 600000 45 Bill Gates