As told by wikipedia the one in the title is a transform useful when compressing data. I spent some minutes on writing these snippets for direct and inverse transformation. May any wise monk help shrinking the code, I'd be thankful and glad to see the results :) 
$/="";$l=length($w=<>);map{print+chop}sort+map{substr"$w\0$w",$_,$l+1}
+0..$l

push@w,split//for<>;map{@_=sort@_;$_[$_]=$w[$_].$_[$_]for+0..$#w}0..$#
+w;print+grep{s/\0$//}@_

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In reply to Burrows-Wheeler transform by shi

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