Its also dependent on your shell's idea of which characters are special. I use ksh and get a syntax error. Can you repost that as something that doesn't depend on your shell?

$ perl -we \
> 'print((split//,"\nechle etn sJutaohrPr akr")\
> [map{splice @_,@_/$^F,$^W}(@_=$%..$^F*$=/5)])'
Backslash found where operator expected at -e line 1, near ")\"
        (Missing operator before \?)
syntax error at -e line 1, near ")\"
Execution of -e aborted due to compilation errors.
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nevermind - here's a version that actually works

#!/usr/bin/perl -w
print((split//,"\nechle etn sJutaohrPr akr")
 [map{splice @_,@_/$^F,$^W}(@_=$%..$^F*$=/5)])
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