In reply to the tutorial request, there's some really good stuff on XSLT at http://www.ibiblio.org/xml/books/bible2/chapters/ch17.html -- chapter seventeen of the XML Bible is the one about XSLT, and is one of the free sample chapters.
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($_='jjjuuusssttt annootthheer
     pppeeerrrlll haaaccckkeer')=~y/a-z//s;print;
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